Weird Issue Going On, Need Help!

trng2build1

New Member
Oct 31, 2005
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I have a 91 mustang coupe. Just did head gasket job, then rebuilt the t5. Have the car running again now. But i have some new issues. I'll list them as follows:

1st) After getting the t5 back in the car and bolting up the exhaust, the car doesn't sound as loud st idle as it was before trans rebuild? Same exhaust as before i rebuilt the trans though. Ideas?

2nd) So I go for a drive tonight. Turn the headlights on and the passenger blinker is lit up? The dash lights are very dim. The blinkers don't work, don't know why. So i push the hazard switch to see if they work. Nope nothing, but the blinker light goes out and the dash lights get brighter (normal brightness for when headlights are on). So i turn off the hazard switch (lights get dim again) then turn on the blinker that's lit up, the dash lights go out, dash fuse blows (5 amp fuse). Anyone have an idea what the hell is going on? If you guys need pics of something lmk. I'll take some or upload a video to YouTube so you can see what is doing
 
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The exhaust tone shouldn't have changed by just installing the transmission. Maybe lower idle, and it seems to not be as loud?

I drove the car a little and after pulling back up at the house the idle sounded quieter than when i first started it up.

Check your ground wires

Where should i start checking? I know of a few ground locations (under ac area, near headlights..... but where should i look first?
 
There is a ground wire on the top of each side of the radiator support for the front lights. Make sure it isn't broken, corroded or missing.

turn-signal-grounds-and-engine-comartment-wiring-jpg.64670


92-mustang-turn-signals-gif.90919
 
The diagram I posted is from the 92-93 Ford factory manual. I got it on CD, and it is somewhat awkward to use.

Try Googling for schematics and see what you come up with.

Helm Inc. has the OEM 91 Mustang manual but it's $90 and I am not sure that it includes the electrical diagrams,

http://www.helminc.com/helm/product2.asp?Make=FRD&Model=MUST&Year=1991&Category=1&class_2=FRD&mk=Ford&yr=1991&md=Mustang&dt=Shop/Service Information&module=&from=result&Style=helm&Sku=FPS1219391&itemtype=N

Ok I'll try Google. Going to try to unplug the hazard switch and replace fuse and see if that changes anything. I know sometimes that the hazard switch can cause issues with the cluster illumination and what not. I'll post back once i do this and see if you can help me figure out the next step. Thanks for replying
 
Ok so, i unplugged the hazard switch. The passenger blinker light is no longer permanently on and cluster is correctly illuminating with it unplugged. The dash fuse did not pop either. Where is the ground for the hazard switch? I tried using a different switch, same result.