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Modern Tractor Discussion Board Topic: Re: 1980 Ford Diesel [Show Entire Topic] [Return to Forum] Author [expand] [Modern View] ronnie finger 09-19-2009 08:02:13 74.163.7.66 20845 Report to Moderator It's a 1980 Ford 340 diesel. It has a fusible link wire that blew, and I replaced that. The in- strument panel does not work- all lights are off. First, it blew the link fuse. Everything had been working at that time. After replacing the link fuse, it started just blowing fuses, one after another, after it had been running for about 30 minutes. Then, one instrument light after another quit working. That's it. Any help will be appreciated. [Reply]  [Send Email] Blue Buddy 09-20-2009 05:44:27 67.220.41.10 20856 Report to Moderator Ok,,fusible links, most of these have 2, one for lights, one for everything else, both come off the battery post on the starter, they are not 14 amp, they are 14 guage, so closer to 50 or 60 amps is the capability,, how to diagnose, a circuit breaker installed in place of the fusible link temporarily is best, a 30 amp will work for this, hook it up, and then with engine off try turning the key to run position and wiggle wire harness in different places to try to locate the short, the breaker will "click" when it shorts and trips, remove 4 dash screws so you can pull the dash partly out to see behind, watch, is not much wire and lights can pull out of the dash holders or fuel guage wire can be pulled off, camera or camera phone pic might be good if you have it part way out before you pull it way out if you have to(will need to unhook tach cable for that), common short is where the wiring lays on top of the fuel tank, wires vibrate and wear though over time, to get at wiring under dash remove the panels under dash so you can look in, you may need to remove the hood for better access as well hope this helps, post back if you have more trouble or need more help, and is always nice to hear what you find too good luck   [Reply]  [Send Email] [Show Entire Topic]   [Options]  [Printer Friendly]  [Return to Forum]   [Add a Reply] Hop to: Another Forum Tractor Talk Tool Talk Restoration Tips Paint & Bodywork Implement Alley Tractor Transporting Allis Chalmers Case Combines Crawlers Farmall & IH Ford Ford 9N,2N & 8N Fordson John Deere MH & MF Harry Ferguson Minneapolis Moline Oliver & Cockshutt Garden Tractors Orphans Stationary Engines Today's Tractors Memorabilia Tractor Tales Using Your Tractor Tractor Pulling Site Comments Test Forum Buyer Seller Feedback Kountry Life Classic Trucks