I had a friend install led lights under my car. Since then my car only operates in overdrive. Error codes that show are: p0765, p0743, p0755, which all relate to shift solenoid problems. I think he may have disconnected a wire or blew a fuse. Can anyone help, if it is a fuse or wire , where is it located?. My car shifted fine before the lights.

 

well the first problem is you put underbody LEDs on a mustang. 2nd have you gone down and make sure no wires were disconnected where he was running the wires for the LEDs, also see what he tapped into to power them.

 

agreed, it's a side effect of putting leds under your mustang. Same thing happens when you put a huge giant wing on the back. Only way to fix it is take the lights out.

 

Without a doubt a wiring problem, I would assume the LED lights are pulling power from transmission circuit or ground problem.

 

The highly computer controlled S197 Mustang hates you for it.
The high frequency of the inverter/duty cycle electronics
are overpowering your CAN BUSS.

Remove it asap and the codes will disappear like
your friends seem to be doing because of the underbody lighting...

If you cant find the owners manual to find the fuse locations,
then its stealership time for you.
Cant help those that cant help themselves (out of a paper bag)....
$65 an hour labor to fix yo friends F'up....
Enjoy the LEDs and get ready for lots of keyed door panels.....