I just joined this forum to get some help. I have been driving 1991 Olds 98 Elite since 2000.
The two radiator fans suddenly stop working a few weeks ago.
Except this problem, everything is fine with this nice car.
From my experience, the fans should spin for several seconds and off when the engine is started. Also, when A/C is on, the two fan should spin.
I monitered both cases but the fans didn't response.
So I bought a GM code reader and checked if there is any code generated.
No code was generated but, interestingly, when the code reder was connected and the key was on but no engine started, the two fans spined.
From the above tests, I think that the fuses, relays, wires, and the fans are fine.
The only thing suspicious is the PCM module.
Is it possible that only one of the functions of PCM can be bad?
Or is there any reason why the fans shows this kind of symptoms?
I really appreciate your help in advance