Troubleshooting Electrical Problems on a Jeep Grand Cherokee

Grand Cherokee Sport

Introduction

1. Troubleshooting electrical problems on a Jeep Grand Cherokee requires the use of a voltmeter with an ohm scale. A wiring diagram for the vehicle is a major help for harness problems and for computer related problems. All components that require high amperage will have a relay between it and the switch. The higher the draw or amperage necessary to operate a component the larger the wire. It is not desirable to run high amperage into a switch.

Relays

1. All relays work like a light switch. There are at least of four terminals. One terminal will have power supplied straight Read more…