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Old 12-29-2004, 12:50 PM   #1 (permalink)
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I have a '94 Taurus wagon with a 3.8L engine and I am having problems with the constant control relay module. First thing was the car died while driving, would not start, and when I put the key in the "on" position this constant control relay module makes a bad clicking noise, also the check engine light comes on and stays on. My friend looked at it and said maybe we could start it by running a jumper wire from the this fuel pump wire (red wire on bottom half closest to the front of the car-wire #24 I think) to the positive battery cable. Then it started and ran fine. I got another CCRM at the junkyard and plugged it in and it ran fine for about 45 min and then the same thing happened-bad clicking noise and no starting. I figured another bad CCRM so I got another one at the junkyard and right from the start it was making the clicking noise and would not start. So I thought maybe the harness going into the CCRM was bad so I got a nother harness and spliced it into the old wires and still is doing the same thing. It will still start and run fine with the red wire jumpered to the positive terminal but other than that it won't run. Should I get another, definitely good CCRM from a dealer or could it be some other problem? Thanks for any and all help.
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Old 12-30-2004, 07:34 AM   #2 (permalink)
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Just as an add-on to my previous mail-I got the brand new CCRM from a dealer last night ($140) and it worked great for about 45 minutes again then the same thing. Makes a clicking, whirring noise and then will not start. Same thing also though, it will start if I jumper wire #24 from the CCRM harness to the positive battery terminal.
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Old 12-30-2004, 10:33 AM   #3 (permalink)
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The clicking would be the fuel pump relay inside the CCRM cycling quickly. Probably a bad relay coil ground. Could also be a drop in 12V signal to the relay coil from the PCM.

Check the ground wire for the CCRM.
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Old 12-30-2004, 10:34 AM   #4 (permalink)
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CCRM pinout
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Old 12-30-2004, 02:09 PM   #5 (permalink)
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Thanks Shoz, do you know where the relay coil ground is and where the ground for the CCRM is?
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Old 12-30-2004, 03:28 PM   #6 (permalink)
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Pin 12 is the 12v+ relay coil signal from the PCM. Pin 18 is the relay coil ground, pin 5 is power out to the fuel pump.
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Old 12-30-2004, 04:52 PM   #7 (permalink)
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Thanks again Shoz, I may have to replace the whole harness from the PCM because something is screwy. I have replaced the CCRM 3 times and spliced in a new connector going into the CCRM and nothing has fixed it. I am thinking there is a short wiring from the PCM before it even gets to the connector at the CCRM.
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Old 12-30-2004, 05:12 PM   #8 (permalink)
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Here is the PCM pinout
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Old 12-30-2004, 09:13 PM   #9 (permalink)
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I'd also make it a point to take a look at the wiring harness that runs over the top of the transmission at the back of the engine (under the battery/ air intake area). It's known to rub against the engine and transmission and short to ground, causing the problems you describe.
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Old 12-31-2004, 09:18 AM   #10 (permalink)
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Hey Racer, that is exactly what I am thinking now. I have eliminated the CCRM and the connector to it so there has to be a short in the wiring between the PCM computer and the CCRM, so I am going to check all that wiring . I got this car for real cheap and put an new tranny in it, which was a lot of work, and the 3.8 engine is a beast so I want to get it running right.
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