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They are rubber shell Packard connectors. Grandfathers of the GM/Delphi weather pack connectors. If they're in good condition they won't break. If they break, they were in need of replacement. The shells are rubber and they deteriorate with age, heat, and/or sunlight. They develop cracks...

I would add that the connectors on my M36A2 at the breakers were nearly disintegrated. They fell apart in my hand when I was fixing my horn issues.

For trucks prior to the A3's: The horn and heater (if equipped) tend to have their own breakers on the firewall, drivers side, under the hood. It's entirely possible that someone tapped the horn circuit to power the wipers. Original wipers were generally air powered so electric is an add...

It is true that nothing is "DOT approved." Headlights used in the US must conform to the applicable sections in Federal Motor Vehicle Safety Standard 108 (FMVSS-108.) The manufacturer certifies that the product is designed to conform to FMVSS-108. There are three products that must be...

For 5 ton, the 8.2 would be under powered and under torque compared to an NHC250.

Zeus51, The glow plugs are generally around 1.2 ohms when new. So, I = V / R and that gives us a 10 amp draw on a 12V supply (12 / 1.2). The relay is rated 80 amps continuous but will tolerate a much higher load for short duration. As a starter relay, the ST85's take several hundred amps...

As cattlerepairman stated, a diesel heavy duty coolant. They have different chemistry than gas engine coolants. Different additives are used to prevent cavitation in the liners. Lower level of silicates to cut down on sludge formation. More corrosion inhibitors. Most of the diesel...

I use one of these buggers myself. Ratchet style crimpers do a much better job.

Well, they are the same company. Kaiser-Jeep purchased by AMC in 1970 and spun off into AM General Corporation as a wholly owned subsidiary. Both trucks would have indeed been produced in the same, originally Studebaker, facility in South Bend. Any differences would be production...

I usually pick up some H4 sockets when I do conversions like that.

From Sherwin-Williams: https://www.sherwin-williams.com/homeowners/ask-sherwin-williams/problem-solver/dirt-stain-discoloration/sw-article-dir-surfactant

Happy to be of service.

OK, for a 40 amp alternator I would go with 125% so a 50 amp fuse. You could probably go with 6ga or 8ga wire for a 40a set up. Although no wire is ever too big. I would look @ 20 - 30 amp for the #10 wire. Maxi fuses are a good available choice for a 50 amp fuse. And me being me, I...

OK. The rectifier will no longer be needed. The regulator will no longer be needed. Generally the ammeter was on wires 8 and 9 on the regulator. If the OE was indeed an alternator that gauge may be a volt meter. From the face description it sounds like an M series voltmeter. There are...

http://www.steelsoldiers.com/showthread.php?158316-M37-wiring-diagram Original equipment was a generator. You can run the one wire to the battery post on the starter or directly to the battery. If you don't have ammeter (some have a voltmeter some have an ammeter) no worries. If you...

In no particular order here... A 3000 watt inverter will draw pretty close to 300 amps at full load. 2/0 cable close to the batteries and a 500 amp fuse if the inverter is within about 10 feet. 10si/12si/cs130 would be pretty undersized for the application. Something more in the 150-200...

Hewitt Industries is a great source for 24V gauges. Nice prices too.

Delco 24V alternators are much less expensive, smaller, and I would believe more reliable. A few decades of development can't hurt. Wolverine Technologies sells a nice kit with all the brackets and bits.

The solenoids can get weak and or sticky with age. I would also check the the 24V and ground at the horn. In my truck the wires were deteriorated where they were crimped into the pins. Also, I had to use some emery to clean the steering wheel nut under the horn button where the spring makes...