1988 Isuzu Trooper diesel conversion

Not much new here lately, as I've just been working on the wiring and it's not terribly exciting. Here is a shot of the interior - I removed the entire dashboard and HVAC system to access the harnesses. I decided, after tracing the entire engine control computer harness, to remove it entirely. It cleaned the engine bay and under-dash area up quite a bit, and none of it was needed after the gasoline engine was removed. At least these things are easy to dismantle...

An invaluable resource has been the official Electrical Troubleshooting Manual (published by Helm, Inc.) for the 1988 Trooper. Much more information than can be found anywhere else - the Haynes manual (pictured, funny enough) is a joke when it comes to wiring information.

I decided to use the 1986 diesel warning light cluster, as it has no 'check engine' lamp, no 'O2' lamp, and it features a lamp which lights up when the water separator is full.

Instead of cutting into the chassis harness, I made an adapter harness to enable a plug-and-play fit, as the diesel cluster has a different connector. I've tried to make it easy to swap the diesel parts over to another chassis in the future, just in case, and so I design accordingly.

I used the diesel harness-side connector and the connector from the gas cluster to build the harness, as well as the electrical book and some diagrams for the diesel wiring (as well as 12V test equipment, of course). See photo in the next post...