When A/C is on in city driving...heat goes up - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-08-2006, 05:39 PM   #11
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Originally Posted by jr's3800
There should be 2 or 3 relays next to the air filter box, I believe on the SSE with Heavy Duty Cooling one relay should be a low speed relay and the other a high speed relay...
I will search for the root of this problem out there first.
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Old 08-09-2006, 10:42 PM   #12
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Default Re: When A/C is on in city driving...heat goes up

Originally Posted by panda1956
Hello folks, I am the first owner of an awsome 1988 SSE VIN C
I have a serious problem when I put my A/C on.
It seems the the A/C is draining off my electrical system when it is on.
(slow wipers, slow flashers, low blower, slow windows etc....
the BATTERY indicator is significantly dropping from middle line when the A/C is activated.
The TEMPERATURE indicator is rising from the mid line toward almost
the scary red zone (especially in city driving) when the A/C is put on.
I have a 140 amps ALTERNATOR that I made it done especially thinking this should normally be sufficient but in vain.
Now I am scare to ride with it far away since it is not sufficiently dependable.
My engine is genuine since it origin with 220,000 kms
Anyone there could help me on what to do to solve this issue in a cost efficient way?

The problem is solved...it was a bad terminal at one of the wires that got loose
creating my high fan cycle circuit to not engage when the appropriate pressure
was reached.
Tested it with the A/C to max today for 1 hour in traffic today at 90C and the gauge stayed not more than a little above the mid point...I am still frozen LOL

The alternator is charging 140 amps but the car seems to consumes more energy that he can produces and my auto electric repair man told me that this is a "normal" case for all the GM with 3.8 engine in 1988.
So I will rest my case with this now unless someone found the miracle cure.
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Old 08-09-2006, 11:39 PM   #13
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If you are running a OEM-style sidepost battery, pull the positive cable and check for corrosion.
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