squidsauce Posted August 2 Share Posted August 2 Hey all, I picked up a 1988 Comanche with the 4.0 and the manual trans. It has been sitting for about 20 years and when I put a battery in it I found out a majority of the electronics are not working. Pretty much the only thing that seems to work is the headlights and the radio. Everything else including the instrument cluster, hvac fan, turn signals, clock, dashboard lights, and so on are not working at all. Has anyone run into this before or any ideas on why it may be doing this? Link to comment Share on other sites More sharing options...
eaglescout526 Posted August 2 Share Posted August 2 How are the fuses? Check those for any corrosion? Link to comment Share on other sites More sharing options...
pizzaman09 Posted August 2 Share Posted August 2 It's possible that the clutch master cylinder or brake master has leaked down the firewall, wreaking havoc on the fuse block. Being an 88, the C101 connector under the hood should be cleaned. I'd recommend starting with any of Cruisers tips that are electrical related, there are lots of grounds to clean and a few upgrades that make circuits more likely to work. Link to comment Share on other sites More sharing options...
Big_Mark Posted August 2 Share Posted August 2 I had to replace my entire fuse block then repair a few lamp sockets, rear wiring harness before my MJ came to life. It was a tedious project but I got through it. Link to comment Share on other sites More sharing options...
squidsauce Posted August 2 Author Share Posted August 2 Yep looks like brake fluid got into the fuse box and destroyed it. I'm going to replace it with a generic fuse box which doesn't look like it's going to be much of a fun job. I'm not sure that will fix all of my issues but at least it should be a good start Link to comment Share on other sites More sharing options...
eaglescout526 Posted August 3 Share Posted August 3 How badly trashed is it? You should be able to just rebuild the block with new terminals. Link to comment Share on other sites More sharing options...
Pete M Posted August 3 Share Posted August 3 or rebuild an automatic fuse box. Link to comment Share on other sites More sharing options...
squidsauce Posted August 3 Author Share Posted August 3 Is there still a source for new fuse box terminals? That would be a good solution if I could just repin it. Link to comment Share on other sites More sharing options...
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