Got an issue I need help with. I have 4- 150watt KC style lights that are getting mounted. With the lights came two wiring harnesses with 50 amp relays. We wanted to power up all 4 with one switch. Question is, can you run the switch lead from both relays to the same switch to get all 4 to come on, or are we going to have to put another 50 amp relay in there to power up the other two relays off one switch? I know this sounds retarded and I should know the answer. We are just trying to do this install right without burning a truck to the ground!

 

Yes, you can use one switch to control both relays, only if the switch can handle the load of two relays.
You can also use the 12v output from one relay to control the 2nd relay.

MikeyB

 

^^^^ AS he said. One trip wire from the switch to trip relay #1, used that relay or trip wire to trip #2 relay, means one less wire run into the cab.



Or, go remote control and have no wires running into the cab.