93 Caddy STS OBD Ground

1993 CADILLAC STS
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DONNELS99
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  • 8 POSTS
My 1993 Cadillac STS is missing the ground to further diagnose an OBD code.

Supposedly the ground is sometimes removed so that only the dealer can diagnose it.

With Cadillac mechanics charging $150/h to diagnose I would rather do it myself.

Can the terminal be grounded to any ground...or must it be to the connector ground.
Feb 3, 2006 at 3:52 AM
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DONNELS99
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  • 8 POSTS
Turns out the code is only readable with the On-Board System.

The Tech 1 tool cannot be used with OBD1 Cadillacs. Another reason to own a Caddy!

Anyways, I have acquired a fault tree and hopefully can find the problem.

The code T061 for "Motor Pump Relay Fault" is present.

I'll post with more info. Anyone have any suggestions?
Feb 8, 2006 at 10:48 AM
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