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post #1 of 5 (permalink) Old 07-17-10, 04:28 PM Thread Starter
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How to test the Relay Control Module?

I'm having some odd issues with my near death 97 Escort; the fan and my fuel pump both run almost non-stop while the car is off, and it's throwing two codes (three really but I know why on the third and it isn't an issue), p0135 and p1132, both upstream o2 sensor codes.

Furthermore, I had originally been popping the fuse for the fan and the fuel pump to keep the car from running the battery dead overnight, but I recently discovered that if I unplugged the o2 sensor everything shut down that way as well. The o2 sensor has been replaced, with no difference, same codes, same malfunctions.

I'm suspicious that that the CCRM has gone, but my Chilton's doesn't mention anywhere how to test if it is indeed bad. Does anybody here know or have any other ideas of what to look for?

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post #2 of 5 (permalink) Old 07-17-10, 05:09 PM
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Re: How to test the Relay Control Module?

Are you pulling 2 fuses? How about the one under the dash that says engine?

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post #3 of 5 (permalink) Old 07-17-10, 05:36 PM Thread Starter
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Re: How to test the Relay Control Module?

I was pulling the Fan+Fuel Inj fuses. Lately I've just been disconnecting the o2 as that seems to accomplish the same, though honestly it never crossed my mind to try pulling the engine fuse.

Nevertheless pulling fuses is a bandaid to keep my battery from dying. I'd like to replace the faulty part, without replacing random pieces until it works! :)
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post #4 of 5 (permalink) Old 07-17-10, 07:33 PM
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Re: How to test the Relay Control Module?

I'd like to know if pulling the engine fuse inside stops the pump and fan.

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post #5 of 5 (permalink) Old 07-17-10, 07:49 PM Thread Starter
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Re: How to test the Relay Control Module?

I would too, so I could let you know! The only problem is that I'm in the middle of removing the instrument panel right now to replace my heater core which happens to be dropping coolant like it was going out of style. When it rains, it pours with an Escort.

Before I go any further I'll hook the battery back up and test that though.
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