M1028a2 Boom!!

[jcollings]

When to start my truck up ,
usually fires right off after wait light has gone out this time wait light went off hit the key boom and now seems like low voltage, Lights oil generator Lights wait light all Visually low, checked all voltages all good. sounds like a dead batteries, which it's not has anybody had this scenario happen to them.

Thanks


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[87cr250r]

Batteries will show full voltage until the are placed under load. Have you confirmed the batteries are in good condition?

 

[jcollings]

Will be doing more investigation today. looking for black Or burnt spot with such a loud boom occurring.
To confirm battery condition will perform carbon pile test on both batteries to confirm condition.
My set up does have the dog head conversion.

Thanks.

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[jcollings]

Well one battery did fail the carbon pile test . so most likely the cause of issue.
but while I'm into it, let's clean up some of the other Terminal issues,
Like the headlight fuse, that terminals melted Along with fuse block where that one goes. going to pull another separate fuse Holder and wire that it's 25 amp, When I got the truck somebody had a 30 amp in there real good.

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[jcollings]

Oh wait, that's supposed to be a 30 amp, I guess it's time to check my eyesight again

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[dougco1]

When to start my truck up ,
usually fires right off after wait light has gone out this time wait light went off hit the key boom and now seems like low voltage, Lights oil generator Lights wait light all Visually low, checked all voltages all good. sounds like a dead batteries, which it's not has anybody had this scenario happen to them.

Thanks


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You have a bad cell in one of your batteries. I had the same issue several years back. To be safe, spend the money and replace both batteries.

How I know this is?
I was a cheapskate driver back in the 90s with my Ford F250 diesel. It wouldn't start on a cold day so I replace just one battery with a new one. What I didn't know was the other original battery was also weak or bad and it took the life out of the new battery. I ended up burning up both batteries and my starter.

Cost to me was lesson learned

Also; even with the "Dog head conversion", the relay could still weld itself closed while cranking with low battery voltage.

How I know this is?
Lesson learned

 

[jcollings]

Yes getting ready to go buy 2 batteries it was crazy how the voltage was there threw me off until I carbon pile tested

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[jcollings]

Added the new headlight fuse holder to the right after connecting the wires directly behind box front.
Installing 2 new batteries did the trick, started up no problem.
I was very surprised though when it failed the loud boom that it made, and what caused that?

Have a great day.

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[dougco1]

Maybe the lou

Added the new headlight fuse holder to the right after connecting the wires directly behind box front.
Installing 2 new batteries did the trick, started up no problem.
I was very surprised though when it failed the loud boom that it made, and what caused that?

Have a great day.

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Maybe the load boom was when one of the battery cells shorted out. Did either one of the old batteries look swelled or distorted? Batteries have been known to blow their top off when going bad.

Also, double check your charging system. Make sure your not over-charging "cooking" your batteries.

 

[jcollings]

No I was expecting to see a melted terminal on one of those batteries, but nothing and no real physical thing so I guess it blew up inside. they do stay on a battery minder small trickle charger when not in use. they lasted 6 years so I shouldn't complain.

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