i need help this is the second day i had to jump start my truck batteries keep on draining themselves could i need a new alternator

 

Could be the alt. or possibly one of the relays to the heater grids could have shorted. They will cause a constant drain on system.

 

i noticed when the heater grid comes on it really drains the battery more than normal thanks for the help

 

is the grid heater relay located on the drivers side in the blck box?

 

is it the one that says fuel heater relay

 

Are they the original batteries?

If so, they've lived a long life, but need to move on.
6+ years out of a set of batteries on these trucks is pushing it.


phox

 

batteries are about a year and a half old

 

The relays are located under the left battery, 2 relays with four heavy guage wires going to them. Like stated above are they the original batteries. The wires then go to the base of the air intake and motor.

 

Does you voltage gage show the system charging at around 14vdc. If not could be alt or voltage reg(lets hope not) its part of the pcm.

 

I am going to go with the intake heater relay being welded shut.

A buddy just had the same problem as you are describing and it ended up being the relays.


Jason

 

it charges to 14 i will have to check the relays in the morning and i will let you guys know whats going on

 

Hang on a second here fella's , the FIRST thing i would do here , is dis-connect both batteries, and load test them seperatly, if they both test good, connect the negative post on one battery , then hook an amp meter between the positive post and the positive cable , there will be a certain amount of parasitic draw , someone with a FSM (WSM, whatever dodge calls it) should be able to tell us what the values of that parasitic draw is. If the draw is over the value in the FSM , then start pulling fuses one at a time until it goes away, if that doesn't find it , start pulling relays, or dis-connecting things such as the grid heaters to see when the draw goes away.

This will help you find your problem , and it is cheaper than throwing parts at a problem...

 

truck started fine today didnt do anything to it i dont know what caused the batteries to drain the other day

 

Remove the heater relay from the fuse box and see what happens the next few days.

That truck will start without the intake heaters down to 0c or 32f.

if it is an intake heater relay stuck it will flatten 2 good batterys within a few hours.


Jason