Questions and Answers

Ford Mustang Backup Lights And Horn Q. Hello Vince, I have a 1988 Ford Mustang GT. The horn blows fuses real quick, it does need some new padding between the plates on the horn button. It does have cruise control and I also checked out the cigarette lighter. Also my backup lights don't work, turn signals do. I did replace the lights. I need to get these working for inspection. Thanks for having a web site like this. Have a good day, Terry Lynchburg,Va.

A. It should be fairly easy to troubleshoot these two circuits. If you read my article Electrical Troubleshooting for tips on locating a short circuit. Also read Loading A Circuit For Testing for a handy little tool.

In a nutshell, you need to cut both circuits into sections and eliminate each section as you go. It shouldn't take too long to find the problems.

Above is the wiring diagram for the backup lights and below is the wiring diagram for the horn.