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Re: Please Help 1992 9000 s Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Thu, 7 Apr 2005 09:20:22
In Reply to: Please Help 1992 9000 s Thanks Ari, Brian Kishel, Thu, 7 Apr 2005 07:10:22 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I'm going to assume that the radiator fan and no-start problems are separate for now.
There are only two things between that yellow starter wire and the battery - the burglar alarm and the ignition key. Let's start with the burglar alarm. It should be located under the right side of the dash, behind the knee bolster. Pull back the carpeting and peek. I have to say I've never gone to look for it, so I'm not sure. It should have a 16 pin connector on it. First, make sure the connector is properly seated. If that doesn't fix the problem, take an ohmmeter and check continuity from Pin 1 (yellow wire) to the yellow wire on the starter. If that is OK, change the meter to Volts, and measure between pin 9 and ground. It should be 0 volts, except going to 12 volts when you turn the key to START. If it doesn't go to 12 volts when starting, the probem is in the wiring or in the ignition switch.
I'm assuming you put 12 volts on that yellow wire, and the car starts.
OK, so what if you get 12 volts on pin 9 when the key is in Start, and good connection between pin 1 and the Starter? That tells me the burglar alarm is shot. Now, I'm not sure about this, but it appears that if you were to jumper pins 9 and 1 on the connector, you could start the car with the key. The courtesy door and dome lights wouldn't work (they come off the same controller), but it's a thought.
As to the radiator fan. First, make sure fuses 6, 7, and 8 in the engine mounted relay box are OK. I assume the engine overheats if you are sitting idling for a long time- like 10 or 15 minutes from cold. If you're overheating when underway, most likely you have a stuck thermostat. The radiator fan only comes on when the Radiator is hot - if that hot coolant doesn't get to the radiator, you'll overheat quickly, even with a gale blowing on the radiator.
Assuming it takes a while at idle to overheat, make sure the thermoswitch is working right. Get to the blue wire from the switch, and short it to ground with the car ON (engine doesn't have to be running -safer that way). The fan should come on. If it does, the problem is that the radiator thermoswitch isn't working - either because it isn't getting hot enough, or it's bad. If that doesn't do it, start working your way forwards. Go to the A/C Radiator fan relay in the engine compartment mounted relay box. Pull the relay out. Pin 85 on the socket should be ground when the radiator is very hot, and open otherwise. (ground means the switch closed). You should have 12 volts on pin 30 - if not, check fuse #7. (again, key ON). If all that is good, short pins 86 and 87 together - you should get a satisfying spark, and the fan should kick on. If all that is good, chances are the relay is shot. My recommendation would be to pop the cover off and clean the contacts. That may be the whole problem with the radiator fan. If you open it up and find a fused mess, buy another relay.
posted by 192.249....
, Thu, 7 Apr 2005 09:20:22 <-- Viewing This Message
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