Low Battery warning on radio

[niftytwofifty]

When I start the truck the radio flashes a low battery signal, and the lights and radio shut off. About 20 seconds later they come back on.

New batteries? Or should I get the alternator tested?

I'm spread kind of thin right now and dont really have alot of time to dedicate to this, so any help appreciated.

[MUDSTROKIN']

Take it to advance or napa etc.... and have them load test your batteries

[niftytwofifty]

new batteries in place. Didn't really have time to get them tested. Hopefully they solve the problem.

[caissiel]

When I start my truck the voltage drops to 11.8 untill the fuel heater shuts off and then climbs to 14.1 or so.
Been doing that ever since I owned it 3 years ago. Have 2 alternators that equaly charge at 30 Amp each at the time.

[MUDSTROKIN']

Originally Posted by caissiel

When I start my truck the voltage drops to 11.8 untill the fuel heater shuts off and then climbs to 14.1 or so.
Been doing that ever since I owned it 3 years ago. Have 2 alternators that equaly charge at 30 Amp each at the time.

That drop is from your glow plugs, i believe in 04 or 05 they stopped using the fuel heaters.

OP - Fix your problem?

[niftytwofifty]

Originally Posted by MUDSTROKIN'

OP - Fix your problem?

truck fired up this morning like a champ.

I am guessing that one of the batteries has been fading over the last couple weeks. As it has been having sluggish starts recently.

FYI- the low battery signal on the radio went away in about the same time that the glow plugs turn off. So I am guessing the one good battery didnt have enough juice to keep the glow plugs, lights and radio going.

[MUDSTROKIN']

Same thing happened to me. Started to have slow sluggish starts had my batteries load tested and one of them wouldn't hold a charge at all and put out absolutely nothing. was about as useful as hooking my battery cables to a block of wood lol replaced the batteries and now she fires right up every time