Starting & Charging System Relays, Sensors, Cables
- Genuine®Alternator ConnectorAlternator Connector by Genuine®. If your starting and charging system parts are in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$22.89
- Genuine®Auxiliary Battery RelayAuxiliary Battery Relay by Genuine®. If your starting and charging system parts are in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$147.14
- Genuine®Starter Inhibitor SwitchStarter Inhibitor Switch by Genuine®. If your starting and charging system parts are in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$24.63 - $77.11
- Genuine®Starter RelayStarter Relay by Genuine®. If your starting and charging system parts are in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. At...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$10.32 - $141.63
- Standard®ABS Speed Sensor RingABS Speed Sensor Ring by Standard®. Front. Direct OE-match replacement provides proper fit, form, and function. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced...Quality-engineered replacement part restores ABS system to proper working condition from a failed or corroded OE ringExact-match design ensures ease of installation$24.41
- Standard®Auxiliary Battery Relay ConnectorAuxiliary Battery Relay Connector by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$36.70 - $48.61
- Standard®Battery Current SensorBattery Current Sensor by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$24.60 - $250.25
- Standard®Battery Power Distribution BoxBattery Power Distribution Box by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$34.68 - $55.30
- Standard®Battery Temperature SensorBattery Temperature Sensor by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$25.73 - $97.47
- Standard®Dual Battery Solenoid RelayDual Battery Solenoid Relay by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$49.85
- Standard®Handypack™ Alternator ConnectorHandypack™ Alternator Connector by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$2.53 - $20.86
- Standard®Intermotor™ Starter RelayIntermotor™ Starter Relay by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$2.53 - $113.38
- Standard®Starter RelayStarter Relay by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all channels of...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$5.06 - $70.72
- Standard®Starter Solenoid ConnectorStarter Solenoid Connector by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$10.03 - $57.66
- Standard®Tru-Tech™ Auxiliary Battery RelayTru-Tech™ Auxiliary Battery Relay by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$27.75 - $58.43
- WVE®Auxiliary Battery RelayAuxiliary Battery Relay by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$4.16 - $157.07
- WVE®Battery Charge RelayBattery Charge Relay by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed the OEM...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$16.45 - $80.36
- WVE®Battery Current Sensor ConnectorBattery Current Sensor Connector by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$20.94 - $859.33
- WVE®Battery Temperature Sensor ConnectorBattery Temperature Sensor Connector by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$23.28 - $127.47
- WVE®Starter Terminal ConnectorStarter Terminal Connector by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$34.52
- Vemo®Main Current RelayMain Current Relay by Vemo®. Grade: Aftermarket. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$13.80 - $489.09
- Vemo®Start Repeater RelayStart Repeater Relay by Vemo®. Grade: OEM - Made in Germany (Q+). Description: Shutter, Relay No. 507. Plug (Connector): 5 Pins. Amperage: 50A. Vemo products are made by high-quality materials and undergo strict quality tests. They are,...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$27.39
- Vemo®Wipe-/Wash Interval RelayWipe-/Wash Interval Relay by Vemo®. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$32.08 - $42.09
- Original Equipment®Starter RelayStarter Relay by Original Equipment®. Designed utilizing the latest technology, this product by Original Equipment features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Premium parts you can rely onDesigned to restore functionality$6.63 - $20.95
- Crown®Starter RelayStarter Relay by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!Developed to improve your driving experienceConstructed to ensure ultimate operation$30.90 - $42.70
- DIY Solutions®Alternator HarnessAlternator Harness by DIY Solutions®. If you're seeking to get your steel stallion back to its tip-top condition, then this top-notch replacement solution is what you should definitely look out for. When it comes to quality, reliability...Designed to help restore your vehicle to its former gloryQuick replacement to let you enjoy an awesome ride again$143.77 - $161.11
- Febi®Alternator ConnectorAlternator Connector by Febi®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the factory original....Designed in compliance with rigorous factory standardsHigh level of quality, ultimate reliability, and solid value$2.85
- Forecast®Starter Relay KitStarter Relay Kit by Forecast®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at...High quality at an affordable priceExpertly made from premium materials$10.13 - $70.22
- Hella®Battery Current SensorBattery Current Sensor by Hella®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the factory original....Designed to help bring your vehicle back in its tip-top conditionFaithful reproduction of the original part in quality, look, and function$45.89 - $133.84
- Hella®Battery Sensor AdapterBattery Sensor Adapter by Hella®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the factory original....Designed to help bring your vehicle back in its tip-top conditionFaithful reproduction of the original part in quality, look, and function$23.97
The battery, alternator, and starter may be the stars of the starting & charging system, but they would be useless without the relays, wiring and connectors that complete the system and conduct the current necessary for operation. And quite often it’s a bad starter relay, frayed or broken wire, or corroded connector that’s the cause of a dead battery or no-start, not a main component. But major or minor, we have the parts to get your vehicle functioning again.
The starter relay allows low current and lighter gauge wire to control the high current needed to operate the starter motor, avoiding the danger and complexity of routing high current carrying, heavy gauge wire to the ignition switch. The battery cables and all the wiring and connectors in the starting & charging system must be of the proper gauge, and the integrity of the wire and condition of the terminals must be sufficient to conduct the required current.
The starter relay is part of the starter control circuit. It can be controlled by the ignition switch or through the Powertrain Control Module (PCM). In an ignition switch controlled relay, when the switch is turned to the START position, current is applied to the relay coil, creating a magnetic field that closes the power circuit contacts and sends voltage to the starter solenoid. Controlling the relay with the PCM allows anti-theft overrides to be employed if the wrong ignition key is used. If the starter relay is suspected as the cause for a no-start, voltage tests can be used to determine relay condition.
Due to the large current demands of the starter motor, the battery cables are the heaviest gauge wires in a vehicle’s electrical system, typically ranging from 6 to 4/0 gauge. They are constructed from stranded copper wire encased in an insulated covering. The positive battery cable is connected to the positive battery terminal and starter solenoid. The negative cable is connected to the negative terminal and the chassis or engine block. A cable that is cut or frayed will have high resistance and may not be able to conduct the current needed to start the engine. The location of high resistance can be found with a voltage drop test.
Corrosion and damaged terminals are another cause of excessive circuit resistance. While battery cable terminals can often be cleaned, it is usually difficult or impossible to clean and repair the small, delicate contacts in alternator, voltage regulator, and other electrical connectors in the starting & charging system. We offer original equipment style replacement connectors complete with wires, commonly known as “pigtails”, which can easily be spliced into the harness. Our battery cables and starter relays are also configured for direct fit, and we carry other system needs like battery sensors and terminal protectors.