Question about 1989 Cadillac Eldorado

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Computer storing codes; need to clear them.

I want to know how to clear the codes on a 89 Cadillac Elderado?

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With the ignition ON, press OFF and WARM on the A/C panel . Ahter codes appear , press OFF and HI to clear codes. If faults still remain, codes WILL NOT CLEAR. Hope this helps

Posted on Apr 20, 2009

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1 Answer

Where is the fusr box on a 1974 elderado caddy


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How do I reset the computer


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1 Answer

Clear the code from the ECU


For the purposes of the D.I.C. 
LO = NO
HI = YES

Starts here:

PRESS: 
OFF & WARM (red button) together
-the D.I.C. will light up the instrument cluster like a Christmas tree
- the D.I.C. will start diagnostics, as soon as it starts displaying ..

PRESS: 
LO 
- until " ECM " comes up

PRESS:
HI
- until " CLEAR CODES ? " comes up

PRESS:
HI
- press only once
- response will be in a few seconds: CODES CLEARED

you are done ...

PRESS RESET and you are back to normal 


Good Luck and Hope this helps

Apr 20, 2009 | 1989 Cadillac Eldorado

1 Answer

89 Cadillac sedan deville when car is on the service engine light comes on and have to disconnect the battery to restart the computer


Disconnecting the battery will neither clear the code, nor stop the light from coming on. Press OFF and WARM together on the a/c panel to read codes. Once repair is made, codes can be cleared by pressing and holding the OFF and HI buttons

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How do i shut off the service soon light on my cadillac


You will have to take it to a repair shop that has an OBD I scan tool to clear the code(s), you maybe able to clear the code(s) by disconnecting the battery for about 10 - 15 min. And see if that works (depending on what type of fault code was stored to set the light). Hope this helps.

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