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Those grounding kits are so easy and cheap to make why would anyone who can work on these trucks buy one? My 2 cents worth. Kurt

Sorry for the clerical error Pa, I was running off of memory and it just ain't what it used to be. LOL Kurt

In the PCB there is something called a reverse polarity relay that will inhibit starting to protect the truck if the batteries get installed backwards so it is possible that you have a bad PCB but with their high cost I'd make sure it was the problem before changing it out. Kurt

The differentials use the oil for lubrication and to help transfer heat. If they are built correctly they can run with a bare minimum of oil without doing any damage to the gearing. If you change out the diffs make sure you get the same gear ratios front and rear otherwise you'll end up...

There are 4 wires that run to the 60 amp alternators in a HMMWV. One heavy ground wire that attaches to the bolt outside the small cover, one heavy 8 gauge wire that connects to a stud under the cover, this is the output where you would measure the output voltage while adjusting the regulator...

If you jumped it from the STE/ICE connector and it worked you just verified the starter and solenoid are good. The start switches do fail occasionally. I'd also look for a broken wire or a separated connector. Kurt

If you haven't installed the supplemental ground harness I'd strongly suggest you find or make one and put it in your truck. It will solve problems like this and eliminate future problems. There are directions on how to make them and install them on most HMMWV sites. Part of installing the...

First question, is it the original alternator and how many miles are on the truck? Sounds like the brushes in the regulator are worn out and not making good contact at RPM. The brush block is available from Southern Automotive as a separate part here...

For all of you new and old HMMWV owners here's one of the best troubleshooting guides I've seen for the HMMWV: https://hummerhuren.files.wordpress.com/2013/01/hmmwv_test-diagnostics.pdf Other than that, download the HMMWV manuals and learn how to follow their troubleshooting flow charts...

Yeah Steve but he said "cable". If he'd had the dual pull kit installed wouldn't he have said "cables"?

Your best bet is to forget that worthless driveline brake and upgrade to the dual pull caliper system where the parking brake locks both rear calipers. What I found early on is that if you tighten the brake handle knob tight enough to actually hold the truck steady is that it won't release all...

One of the engineers at Southern Automotive Current contractor) told me they ship 30,000 alternators a year to the Army so it doesn't look like your 5 ton failure rate is any different than the rest of the 60 amp world. Kurt

For the turn signal switch you want to search for BA9S LEDs. I have had problems with them not working in all turn signal switches though. I put them in both my 151A1 and HMMWV where they worked fine but when I put one in a friends 151A2 it wouldn't flash. Since they are diodes they are...

Search eBay for "10-30v LED 7528" The BA15D is the specification for the base pattern, 15mm diameter, dual contacts. I like to run these in the trailers too because I don't have to change bulbs when I pull it with the HMMWV or the 880. Kurt

You can find almost every manual you need for the HMMWV on this site: http://www.imfmotorpool.com/HMMWV_M998_Manuals.html

You can crack the filter bleed petcock and see if it has fuel there. I ran a tube down the edge of the cowl so that diesel fuel wouldn't crud up the panel and drain that into a bottle on the ground. You can also crack a fitting on an injector to bleed the system but that tends to make a mess...

Relays tend to be fairly reliable components so I would start looking at the diodes and MOSFETs for signs of being open or shorted. A simple ohmmeter will do the job. I haven't opened either of these boxes but would love to get some dead units to test. The old Prestolite boxes were easy to...

I had a similar problem on a road trip up to Portland. About 200 miles from home my gauge started to read 0. The engine ran just like it always had with no additional clatter beyond the normal diesel noises. Pulled over and checked the oil level, it was fine. I bit the bullet and finished...

When I originally got my HMMWV 15 years ago we had to have most of the soft items remade. When I did the high back seats they were petty well worn and Dave Pizzoferrato at WeeBee Webbing made me a beautiful set of cordura nylon covers from the tattered remains of mine. They're still in the...

I know about Home Defect but can they put it in spray cans?