[V6-12v] Need help with cooling problem

[apowell@colocougs.org]

Today my wife's 1993 90Q tried to overheat while she was driving in town. Fortunately, she pulled
over and shut it down before any damage too place. The problem is easy to spot - the radiator
cooling fans weren't running.

I checked all fuses in the fusebox, and they're all good. I have both the Bentley CD and a Mitchell
CD, and neither was much help. The only mention of a something to test is the Engine Coolant Temp
Sensor, and it's described (depending on the source) as being at the rear of the engine both on the
left side AND the right side. Swell. I can't find the darn thing.

I suspect the culprit is either an engine temp sensor or the three-connection relay strip located in
the driver's side front fender, but I can't find ANY test procedures for the strip, and I can't find
the temp sensor. Not helpful.

Tomorrow AM I want to download the codes as per the procedure at
http://www.12v.org/maintenance/dtc.php . Unfortunately my MIL (engine malfunction indicator light)
is burned out, so I need to use the test light method - but although the method is referred to on
the website, I can't find a description of the method on the website. Can anyone help me find it??
(On the 200 models, I believe the test light connection point was a pair of connectors in the
driver's side footwell, but I checked and don't see any such connectors on this 90Q.)

So, to sum up, I'm looking for:
1) Confirmation of where the Engine coolant Temp sensor is found.
2) Test process for the 3-connector relay in the driver's front fender. (If any)
3) Where to connect a test light to check codes on this car.

If I can't find something to try before Monday AM, it's going to the shop.

BTW - curiously, when I tried to check the codes before finding the MIL light was out - the cooling
fans ran for a moment. But they stopped and didn't come on when I warmed up the engine...so I'm
still thinking it's a relay.

I also spotted a small radiator leak, but that's the next project.

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Al Powell
apowell at gocougs.wsu.edu
1958 Fiat 1200 Transformabile Spyder
1983 Datsun 280ZX Turbo
1993 Audi 90Q
1991 Camaro RS Convertible
1997 Chebby Blazer
1999 Chebby Blazer
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