wired up fan switches, almost caught the car on fire

[chuck943]

pin 3 and 4 are the fuse feeds from the 60 amp fuse they just come from fuse then splice off to pins 3 &4,these 2 are hot at all times. Pins 1 & 2 are the switch side of relay for low speed they just splice together and go to fan motor. Pin 6 & 7 are the feeds from switch side of relay for high speed fan, they splice together and go to fan motor. Pin 14 is from PCM to the invertor inside CCRM, remember what I told you about how that works,fan is normally on PCM turns it off thru the invertor. Pin 17 is the ground from PCM to the coil side of high speed relay. Pin 12 & 24 are the power feeds from PCM to coil side of both relays. Pin 24 is powered up by EEC relay in CCRM then leaves CCRM going to PCM before it gets to PCM a splice runs off of it and comes back into CCRM on pin 12 and this feeds both high/low relays coils

 

[HISSIN50]

well after testing with the meter im even more confused. with the switches turned on, both of the wires going to the pins on the ccrm are getting power regardless whether the ignition is on or off.

You want Pin 17 on the CCRM to receive ground.

And it sounds like you did not use an accessory (key-on hot) power source for the switch. Otherwise, there would be no power in the circuit with the key off.

 

[buddyf87]

You want Pin 17 on the CCRM to receive ground.

And it sounds like you did not use an accessory (key-on hot) power source for the switch. Otherwise, there would be no power in the circuit with the key off.

i tried just giving ground to 17 like you suggested and it did nothing, so i hooked it back up with power and it works half the time.

and i didnt use an accessory because i want to be able to leave them on at the track with the car off between runs.

tomorrow im going to rip out ALL my wiring and start again just to be positive theyre all going where they should be. if that doesnt work im going to just run some 10 gauge wire straight to the fan wires and get some switches that can handle 40 amps