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Pin A is +24 VDC Pin B is Ground Pin C is No Connection (NC)

Load test each battery and see if one is bad. Batteries can fail anytime. I have had them fail in diesel trucks without any warning. And NDT is right, 4 years on a 6TL is about all you can expect. I won't buy them again.

Clean the terminals with this; https://www.autozone.com/test-scan-and-specialty-tools/battery-terminal-brush-cleaner/workchoice-battery-terminal-cleaner/80497_0_0 High current connections need to be perfect, minor flaws will cause issues like the ones you are having. Clean connections are vital...

The filter discussion and has run it's course long enough. We can sum up that like a lot of things, every one has their favorite brand of filter and they can use what they wish. Let's stop the filter bashing discussion now and continue on with the original CUCV discussion of "What have you...

Glad to hear it works and it solved the poor coverage. What color is the antenna? Did you paint it OD green?

From what you described, the card is functioning normally. With the glow plugs disconnected you have reduced the load on the system. The controller is getting a higher than normal voltage input (orange wire) and is cycling the relay to protect the glow plugs. The relay will stay closed for a...

Before you get out of bed....

Old ham radio saying, "Antennas that are put up in bad weather work better"

"Can you hear me now?"

Averaging 7200 per year on the M1009 for the last 6 years. Took it on the 2015 Bankhead and the 2017 RT66 MVPA Convoys.

Welcome back to PA.

The glow plug card works on a 12 volt system because the glow plug system is a 12 volt system. In the stock CUCV config, the only part of the GP system that is 24 volt, is between the bus bar and the resistor. Once the relay is closed, the resistors and the glow plugs in combination with each...

Rule of thumb is: 234 divided by the frequency in MHz. This gets you close to a 1/4 wave antenna length for most frequencies. Examples: 234/27.185 MHz = 8.6 feet for CB Channel 19 234/52.525 MHz = 4.45 feet for the 6 meter Ham band 234/147 MHz = 1.59 feet for the 2 meter Ham band 234/860 MHz...

Wilson makes a lot of Cell Boosters. They work well. https://www.wilsonamplifiers.com/ The passive antenna system will work under the right conditions, it's all about the math to get a passive system to work properly.

Matt, Actually, you are incorrect in your statement on the Cascading GP failure event. Over voltage to the glow plugs will damage them very quickly. I had a CUCV with all 8 plugs good one day and within a week, 3 of them are bad. You are correct with the GP card cycling the relay to help...

The glow plug card bypass wiring is correct. That is actually a light blue wire, it controls the GP relay that you are hearing click. When that wire is grounded it closes the GP relay. The GP card will automatically determine the proper amount of time the plugs need voltage based on a few...

Moved to proper forum.

Moved to proper forum.

Looks good Dave, but you need to get that white truck painted to match the trailer.

It may be a good idea to clean the connector contacts in the card holder/connector as well.