1995 Mercury Grand Marquis blowing 40 amp fuse as soon as I turn on ignition
It will help if you can identify the 40 Amp fuse that is being toasted when the key is turned.
I looked briefly at a fusebox diagram and found 3 circuits protected by a 40 Amp fuse. The Lamp circuit protects several circuits which have smaller rated fuses on each separate wire. The 40 Amp protection seems to be a safeguard if all the smaller circuits are active in total. Turning off the automatic headlights, should reduce power drain.
The next circuit is the Rear window defroster. Can easily pull 40 Amps, but once the 40 Amp fuse breaks, it should have no effect on the engine.
The last circuit, on the cars with Trailer Tow or Police package has a
40 Amp fuse on the Battery charge Relay. This is a remote possibility. But the engine should be able to run without an Alternator for several minutes using Battery power.
Have them check the fuel pressure. The Inertia switch could have tripped while the car was being repaired. It does not explain the wiring short, but can explain the no start condition.
Again, if the same 40 Amp circuit is overloading, identify the circuit with the fuse box diagram.
Feb 18, 2014 |
1995 Mercury Grand Marquis