If there is one thing Jeepers detest it has to be electrical troubleshooting. They would much rather do the Rubicon Trail - alone! However, troubleshooting doesn't have to be so difficult. Troubleshooting is a scientific process that requires a methodological approach. Once you know what to do and take a step by step attitude towards doing it, troubleshooting can be a piece of cake.
Using troubleshooting manuals:
Get yourself an electrical troubleshooting manual. This is not a trial and error kind of problem. Neither is it a Eureka! moment. The only way to go about troubleshooting is to follow instructions.
Electrical troubleshooting manuals have wonderful diagnostic trees that follow a logical flow. The troubleshooting manuals are created in an easy to comprehend and use manner. A good wiring diagram allows you to troubleshoot any electrical problem.
Getting a troubleshooting manual is the first step to effective electrical troubleshooting. Also, you need to ensure that the troubleshooting manual shows the schematic and the wiring diagram.
Electrical troubleshooting tools:
You also need to buy some tools to ensure effective troubleshooting.
A 12-volt test is required to check if the circuit has power or not. When hooked up in reverse you can use it to check if a ground circuit is good or not.
A VOM or Volt Ohm Meter is required to perform specific voltage and resistance tests during troubleshooting.
A multimeter is another tool that you will need to help you actually see the problem.
Electrical troubleshooting tips:
All electricity flows in a closed loop. In the Jeep almost everything has a single wire going into it or what is known as an 'open loop'. The ground or the Jeep's body and frame forms the second wire and closes all loops.
Half the battle during troubleshooting is won once you figure out where to start. Diagnosing the problem is the tough part. Fixing it is easy. So make sure you diagnose the problem correctly.
With a little bit of patience learning electrical troubleshooting can actually be fairly easy.
One of the best places that I have found for help with my jeep electrical problems is
All Data.com
They not only have wiring diagrams for every jeep out there, they also have
All the latest recall and technical service bulletins for your rig
Illustrated diagnosis and repair procedures
Diagnostic charts and trouble codes
Component locations and diagrams
factory maintenance schedules
And much much more
It’s like having your own personal auto mechanic for less then the cost of a dinner for two. And the subscription is for a full year. I have a subscription for my 97 TJ and have found them to be invaluable.