intercooler pump switch
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From: Elkton, MD
intercooler pump switch
I was down at Cecil County dragway a few weeks ago and noticed another lightning with a switch installed under the hood. The switch controlled the intercooler circulation pump, allowed coolant to flow through cooler with the key off. Does anyone know where to wire this switch in without hacking the harness and does it require a relay?
Thread Starter
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Senior Member
Joined: Jul 2004
Posts: 920
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From: Elkton, MD
"Intercooler pump switch wiring made easy..
Hey all, Sal here. I know many have had problems wiring a switch for the intercooler pump in the past, so I figured I'd pass along this info on how to do it properly. First, you need to locate pin 70 on the PCM plug (White wire with an Orange tracer). This is the PCMs output to turn on the pump relay. You need to splice a wire into this wire. Then run that wire to a swtch. The other end of the switch must be wired to GROUND. The PCM does not supply voltage to it's outputs, it supplies ground. This gives you control over the intercooler pump relay. The power side of the relay trigger is energized when the key is in run, so naturally the pump will only come on in run, but this is no big deal. Doing it this way doesn't cause any screwy circuits that can blow fuses and melt wires as some have had happen. This way turns on the pump relay which is the safe and proper way to turn on the pump. Hope this helps and HAPPY COOLING!!"
EZGZ,
Here's what I found.
Thanks Sal for past post's!
Hey all, Sal here. I know many have had problems wiring a switch for the intercooler pump in the past, so I figured I'd pass along this info on how to do it properly. First, you need to locate pin 70 on the PCM plug (White wire with an Orange tracer). This is the PCMs output to turn on the pump relay. You need to splice a wire into this wire. Then run that wire to a swtch. The other end of the switch must be wired to GROUND. The PCM does not supply voltage to it's outputs, it supplies ground. This gives you control over the intercooler pump relay. The power side of the relay trigger is energized when the key is in run, so naturally the pump will only come on in run, but this is no big deal. Doing it this way doesn't cause any screwy circuits that can blow fuses and melt wires as some have had happen. This way turns on the pump relay which is the safe and proper way to turn on the pump. Hope this helps and HAPPY COOLING!!"
EZGZ,
Here's what I found.
Thanks Sal for past post's!
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Joined: Aug 2003
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Originally posted by bglanden
"Intercooler pump switch wiring made easy..
Hey all, Sal here. I know many have had problems wiring a switch for the intercooler pump in the past, so I figured I'd pass along this info on how to do it properly. First, you need to locate pin 70 on the PCM plug (White wire with an Orange tracer). This is the PCMs output to turn on the pump relay. You need to splice a wire into this wire. Then run that wire to a swtch. The other end of the switch must be wired to GROUND. The PCM does not supply voltage to it's outputs, it supplies ground. This gives you control over the intercooler pump relay. The power side of the relay trigger is energized when the key is in run, so naturally the pump will only come on in run, but this is no big deal. Doing it this way doesn't cause any screwy circuits that can blow fuses and melt wires as some have had happen. This way turns on the pump relay which is the safe and proper way to turn on the pump. Hope this helps and HAPPY COOLING!!"
EZGZ,
Here's what I found.
Thanks Sal for past post's!
"Intercooler pump switch wiring made easy..
Hey all, Sal here. I know many have had problems wiring a switch for the intercooler pump in the past, so I figured I'd pass along this info on how to do it properly. First, you need to locate pin 70 on the PCM plug (White wire with an Orange tracer). This is the PCMs output to turn on the pump relay. You need to splice a wire into this wire. Then run that wire to a swtch. The other end of the switch must be wired to GROUND. The PCM does not supply voltage to it's outputs, it supplies ground. This gives you control over the intercooler pump relay. The power side of the relay trigger is energized when the key is in run, so naturally the pump will only come on in run, but this is no big deal. Doing it this way doesn't cause any screwy circuits that can blow fuses and melt wires as some have had happen. This way turns on the pump relay which is the safe and proper way to turn on the pump. Hope this helps and HAPPY COOLING!!"
EZGZ,
Here's what I found.
Thanks Sal for past post's!
Warning Sal made that post back in 2000, In 02 the computers changed and its a different pin and might be a different color wire. The Best thing to do is pull the relay, get a switch with 2 wires and install that in place of relay when you go to track, then install relay back in when you leave.
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From: On the side of the Road attempting to explain 135 miles per hour
Originally posted by BigFan
Warning Sal made that post back in 2000, In 02 the computers changed and its a different pin and might be a different color wire. The Best thing to do is pull the relay, get a switch with 2 wires and install that in place of relay when you go to track, then install relay back in when you leave.
Warning Sal made that post back in 2000, In 02 the computers changed and its a different pin and might be a different color wire. The Best thing to do is pull the relay, get a switch with 2 wires and install that in place of relay when you go to track, then install relay back in when you leave.
Bob