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Radiator fan curcuit question...

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Old Apr 3, 2004 | 09:17 AM
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305Tiger's Avatar
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Joined: Oct 2003
Posts: 228
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From: Hartford, CT
Car: 1987 Trans Am
Engine: LG4 305 w/emissions & A/C delete
Transmission: "...check!"
Axle/Gears: it's crap...they're stock!
Radiator fan curcuit question...

Ok, so for the past few days my engines been getting up to about 230*-240* at low speeds, from between 30-45mph. So I decided that I'd see if it was the fan, and left it running for about 15 minutes while lightly pressing the gas to about 1400RPM.
After getting the engine temp to about 235*, I shut the car off and turned the key to ACC. and my fan didnt go on.

So i poped the hood and visually checked the curcuit board the fan was wired to, and I've come to the conclusion that the two copper plates that need to touch for the fan to switch on, are somehow not touching when they need to be!

Heres the numbers:
On the front outter plastic of the curcuit board housing, reads from top to bottom:

10038311(part number I'm assuming?!?!?)
Z-8247 TRW
made in usa(thank g0d!)
7120

On the back of the curcuit board itself are the numbers:
446C

My only thought on solving this probblem is to buy a switch and just wire it to the fan so that I can manually turn the fan on.

-G
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