Problems pulling codes off F250 with EEC-IV

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Jul 31, 2003 | 09:01 PM

carpe_diem

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Problems pulling codes off F250 with EEC-IV

1989 F250HD with EEC-IV

I found the EEC-IV connector and I am jumping SIG RTN to STI. Then I am turning the key to ON (engine off). The test procedure says Check Engine Light should then flash out the codes. However, nothing happens. I tried dozens of times already.

Something is obviously missing. Am I not getting the contact somehow? This is a very simple test. Should I clean the connectors - if so, how? What else should I try?

Aug 1, 2003 | 09:16 PM

Franklin2

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From: Virginia

Problems pulling codes off F250 with EEC-IV

Instead of using the dash light, I would try using the analog voltmeter method and see if it works.

Aug 1, 2003 | 09:34 PM

dro man

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From: Arkansas

Problems pulling codes off F250 with EEC-IV

Pin 17 at the pcm may have been removed from the harness or cut to keep the CK eng lamp from commming on.

Aug 1, 2003 | 10:43 PM

carpe_diem

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Problems pulling codes off F250 with EEC-IV

I will try the voltmeter method.

Secondly, where is the PCM located?

Also, looking at the EEC IV connector, I don't see anything at the STO recepticle. There doesn't appear to be any metal there. Don't know if that's how it should be.

I got some cleaner for electrical connections. I will spray the recepticles with that.

Aug 3, 2003 | 06:06 PM

steve83

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From: Memphis, TN

Problems pulling codes off F250 with EEC-IV

Look in my signature link in the GP Pics album for a picture showing the location of the EEC under the L hood hinge, and in the Diagrams album for the pinout of the EEC TEST connector.