Dome light and locks turn on/engage downhill?

[TwistedD85]

I've come to notice my dome light and locks start acting funny when going downhill on occasion, or after going downhill. The dome light comes on like I just hopped in the car and the locks engage periodically during the same period of time. The only thing I can think it'd be would be either something to do with the alarm or the ignition lock cylinder, it's really worn out so I suspect the position of the keys while going downhill might be what starts it. Any ideas? Anyone else had this problem? I mostly just find it annoying at night. Oh and I've replaced the MFS so that's ruled out. :thankyou:

 

[mrecoolgar]

If the ignition switch is loose that is a good assumption.
Or the drivers door jamb switch may be faulty.

 

[TwistedD85]

It seems pretty tight and springy, but I suppose there could be something else wrong with it. Any way to really test it besides replacing it?

Edit: Actually come to think of it, I never get a Door Ajar light while driving so chances are it is the lock cylinder.

 

[mrecoolgar]

If you or a previous driver had a heavy keychain, that weight will negatively affect the switch.
Try wiggling the switch next time it happens.

 

[TwistedD85]

I've tried that but the timer doesn't allow the dome light to turn off quickly enough so I can tell if it's worked or not. I think about all I can do is try and take off all my keys and drive around for a while, see if turns on without any weight hanging off it, or just replace the whole thing. They're like $15-$20, not that big of a deal I suppose.

 

[TwistedD85]

Used only the key and I had no trouble what so ever, to the parts store!

 

[TwistedD85]

Ooor not. Held the button for the alarm before I ever began to turn the key and it seems that's what did it. So my alarm is *****, dunno if it's a wiring issue or if it's the control box that's gone bad. I friggin HATE car electrics and wiring.

 

[mrecoolgar]

I've pulled more than one after market alarm.
They cause more prolem than good.

 

[TwistedD85]

I think it's either a factory Ford unit or a dealer installed unit. Either way it says "FORD" on it with a blue oval. I'm kinda afraid to remove it, does everything still work after taking it out?

 

[mrecoolgar]

If you remove it everything will still work.
However, there should be an inline fuse you can remove to deactivate it.

 

[TwistedD85]

Ah, alright, I'll see if that works :thankyou: Just wasn't sure if it was an addition or if the alarm was spliced into the wiring.