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30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code PEP30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 10/27/16. Online orders scheduled for in-store pick up must be completed by closing on 10/26/16 for discount to apply.

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  • Part #: 400R|
  • SKU: 244671

Available tomorrow

Pay in Store Available

    • Heavy-duty 30 amp normally open relay
    • 12-volt / 30 amp normally open contacts
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

Wolo Heavy-Duty Relay - 12-Volt/30 Amp

Heavy-Duty normally open relay 12-volt/30 amp. Model 400-R is the exact replacement for all Wolo 400 series air horns
  • Heavy-duty 30 amp normally open relay
  • 12-volt / 30 amp normally open contacts
  • Same relay that Wolo includes with all 400 series horns.
12-volt / 30 amp relay N.O. relay


Rated 3 out of 5 by 1 reviewer.
Rated 3 out of 5 by WIRING DIAGRAM COMPLETLY WRONG BUTTON CONNECTION IS STUPID I used a nine volt battery to get the relay to close the circuit and work. The wiring diagram for the horn kit is completely wrong and i could not get the relay circuit to close until i converted it to a two wire positive system. November 1, 2015
  • 2016-10-23 T07:57:03.124-05:00
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