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1990 mustang lx 2.3L intermitent problem turn signals and ac fan wont run. Sometimes when driving they will just start after when we started the car they didn't work. What could cause them to turn off and on like that?
Re: 1990 mustang lx 2.3L intermitent problem turn signals...
Check the ignition switch to see if it's coming apart. You will have to remove the lower trim on column. The electrical switch will separate causing your concern. Good luck.
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run the fault codes .
indices that the ambient temp /baro sensors are not working and the ECm is not getting the signal to increase the fuel requirement ( same as pulling on the choke m)
Try installing a jumper across the N/O terminal at the relay socket. Temp sensor in the radiator or in the thermostat housing supplies the signal for the relay the other relay signal is supplied by A/C in on position. both fans will run continuous with A/C on. One fan runs intermittent relative to water temp. Be careful not to blow a head gasket. If you leave the jumpers in place, the fans will stop when the ignition is turned off, save the engine until you isolate the relay signal problem. then simply remove jumpers and reinstall the relays
Dear Charlie,
May I suggest you take the car to a good (old?) mechanic and have it "changed?".
Right now the fuel pump is hooked to the battery directly, which is why the pump will not turn off.
Please have him hook the pump up so it only runs when the ignition is on.
God bless your efforts.
There is a starter relay--probably in the relay box by the battery. Swap the starter relay with the horn relay and try to start the car. If that works, replace the relay. If it doesn't work, please see my tip at http://www.fixya.com/cars/r6222268-engine_doesnt_crank_turn_over .These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
Some vehicles have sensors that can control the electric fan with the ignition off to keep the heat buildup that naturally occurs right after turning off the engine.
This can prevent hard starting that can happen with a hot engine.
If it is doing this an abnormal amount, the sensor that is operable with the ignition off may be failing.
Before turning off the ignition, check to see if the engine temperature is pushing the 'red zone;' if it is, then the fan operation may be normal but your engine may be running hot.
the ground is usually black. the one wire will be power, one will be power when the turn signal is on. take a test light and you can find which one is which.
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