ECC is not lighting up or working - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Everything Electrical & Electronic Have an electrical problem? Lighting, Alternators, gauges, DIC, HUD, etc? Post it here. Please post Audio problems in the Audio forum, and Engine control problems in the appropriate Mechanical forum for your year.

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Old 02-17-2007, 12:28 PM   #11
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There is a possibility of a bad ground, but this looks more like a main power feed to me.

Fuses to check:

#11 and #17 in the main drop-down panel on the driver'* side. These power the Hvac Programmer. #17 also feeds the ECC control head.

Next question is do you have the stock stereo or aftermarket? The stock stereo in 92/93 cars with ECC controls the display brightness control for the ECC display. Do your buttons light up, and just the display is out? Or the display and the button backlighting? They come from different sources. Button backlighting comes from the headlamp switch/module. VF display brightness control on the ECC comes from the radio.

With the instrument panel lights on (headlights on), and set to bright, what do you read on the purple/white wire on the back of the ECC? It should be Pin 2.
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Old 02-17-2007, 02:26 PM   #12
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I looked for the ground connections and couldnt find them. i have the drivers side basically ripped out. im an idiot if u couldnt tell. so i decided to check the fuses. they were both good bu the wre running into the back of no.17 was a little loose i wiggled it around and my display came back on. checked all the buttons and they work fine. im so glad u guys helped me i havent been able to drive my car in almost a month. Thanks again.
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Old 02-17-2007, 03:35 PM   #13
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This is a most overlooked electrical problem. The circuit fuse could be good but the socket its inserted into is loose and looses contact with the fuse. I too had this problem with my power window circuit. Youll need to get behind the loose prong from side to side and tighten up on it with a small screwdriver to prevent further problems. Or stick a piece of brass shim in along side of the fuse blade.
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Old 02-17-2007, 04:56 PM   #14
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Glad you got it fixed. I get another gold star.

The grounds you were looking for are under the carpet just inside the door sill.
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Old 02-18-2007, 12:40 AM   #15
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thanks again guys. now i can move on to the important stuff like putting my stereo and neons in.
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