it shouldn't
You could remove the ABS fuse but the ABS dash light will remain on indicating the ABS system is not functioning.
Simply get it plugged into an ECU reader as it is probably a fault that the ECU is rembering, if not get a manual for your motor and look for an additional sensor.
add coolant
The #1 cause of cold air from the heater when the car is stopped, or the engine is idling, low engine coolant levels.
There is a CEL, Check Engine Light, on the 1989 Thunderbird.
If the heater light is flashing on your 2004 Transit, it typically indicates a problem with the engine's cooling system, such as low coolant levels or a malfunctioning thermostat. It could also signal an issue with the heater itself, like a clogged heater core. It's essential to check the coolant level and system for leaks, and if the issue persists, consider having a professional mechanic diagnose the problem. Ignoring the warning could lead to overheating and potential engine damage.
The brake light fuse on a 1987 Thunderbird is located on the back of the headlight switch. It is not in the fuse box.
Heater core (radiator) needs to be cleaned or changed
Low coolant, stuck thermostat, blocked hoses.
where is backup switch located on a 63 thunderbird
It could be from many areas such as the water pump, the radiator, radiator hoses, heater hoses, heater core, freeze plugs, intake manifold gaskets, etc. Take a good flash light and try to locate the source of the coolant leak. If you have no luck that way take it to your local garage and they can pressure test the coolant system to force the leak.
not likely. you will more than likely have a coolant leak in the car that ends up with coolant on the passenger floor. pressure test the system and look a for leak. the only way the check engine light would come on is if it had a coolant pressure sensor. most cars don't, only sweet expensive rides