Questions & Answers for: Chevrolet 12 volt relay

12 volts to the relay. The relay is normally energized by the 12 volts through the 20 Amp fuse in the cab and through the switch. I think you find that the fan has the normal speeds except for missing

use a volt meter while you depress the horn, and see if you are getting 12 volts, if you are not and the fuse is good, then it is the relay, if you have 12 volts to the horn wire, then the horn is bad

volt meter check the harness. With the key off check all of the connectors, you are looking for 12 volts positive. Now have some one turn on the key and look for one of the wire that had no volts, get

...fuel pump will not run until is sits for about 30 min, then will run again with 12 volts to test lead Sounds like a fuel pump relay to me, or the fuel pump is bad if it's getting 12 V at the p

Relay has a shorted contact...If +12 volts is present...The Mode Switch (A/C, Bilevel, Vent ...etc) is defective...If you had left the mode switch on (A/C for instance) when you discovered the fault..

put 12 volts directly to the fan.the fan works. but the fan will not turn on when the engine is running checked relay and fuse If you put 12 volts on the motor and it dosn;t spine its not any good

12 volts is not there, check the fuel pump relay. it is usually up on the drivers side firewall. With the key in the on position without starting the engine, you should have 12 volts to the pump for 3

12 volt source like a small 12 v battery You unplug the relay from the car. Then you can apply the 12v to the relay coil contacts and measure the relay contacts to see if the relay switched ok. If you

12 volt signal to the relay. Pull out the relay and probe the relay socket with a voltmeter. There should be 2 terminals with 12 volts when the key is on. With the key off, there should be one 12 volt

...That means that the relay is working but either the horn itself or wiring to the horn is bad. Check for 12 volts at the horn. If 12 volts is present and a ground is present, replace the horn