HMMWV A2 vs A1 Starter Troubleshooting

[ke6rwj]

I have a new to me 1097A2 that wont turn over... I going through the normal check the neutral safety switch etc, but in looking for more detailed troubleshooting info, im seeing lots of references to STE/ICE procedures.. The A0/A1 had the AM GENERAL Component and testing book with listed as the M998A1 (one with the color HMMWV on the front), is there anything like this for the A2? is this still valid for troubleshooting starter issues on the A2?

This was a former police vehicle, so im sure there is some nuttiness with the wiring, They also said it just quit starting one day and they surplussed it off.

comments?

-- Chris

 

[NDT]

Suggest you get under the truck with your voltmeter and see what ya got. Do you have 24 volts at the starter? Do you have 24 volts at the solenoid when someone turns the ignition to crank?

 

[ke6rwj]

Suggest you get under the truck with your voltmeter and see what ya got. Do you have 24 volts at the starter? Do you have 24 volts at the solenoid when someone turns the ignition to crank?

yea im doing that, followed the path of voltage through the Neut Safety switch, did cont checks through the plug at the controller to the solenoid wire on the starter cable 74A, im at the point where i need to remove cable 2A from the generator and try to start to single out the controller box. This has a 200A Niehoff so its different. working that out,,

my question was to determine if the wiring on the A2 is so dramatically different that using the troubleshooter is described earlier is still valid or not. I have a few A0/A1 HMMWV this is the first A2 / 6.5 so just getting familiar with the differences..

-- Chris

 

[Mogman]

The starter circuits are pretty much identical, have you tried jumping the pins on the STE/ICE connector?
That would eliminate the neutral switch etc.

 

[williamh]

I have a new to me 1097A2 that wont turn over... I going through the normal check the neutral safety switch etc, but in looking for more detailed troubleshooting info, im seeing lots of references to STE/ICE procedures.. The A0/A1 had the AM GENERAL Component and testing book with listed as the M998A1 (one with the color HMMWV on the front), is there anything like this for the A2? is this still valid for troubleshooting starter issues on the A2?

This was a former police vehicle, so im sure there is some nuttiness with the wiring, They also said it just quit starting one day and they surplussed it off.

comments?

-- Chris

 

[Mogman]

The starter circuits are pretty much identical, have you tried jumping the pins on the STE/ICE connector?
That would eliminate the neutral switch etc.

That would be upper case S (wire #74 to solenoid) and upper case M (24V), there are also some lower case terminals

 

[ke6rwj]

The starter circuits are pretty much identical

That's what I needed thanks..

And yes did the ste jump did not turn the starter

Ended up replacing the starter as it looked terrible, solenoid was bad but still didn't crank with new one.

So before I got too far down wanted to be sure there wasn't some other kind of safety with an A2 that's not on the A0/A1.

Anyway, replaced the control box, it's cranking now. Working on fuel now...

Thanks to everyone.

-- chris

 

[ke6rwj]

 

[Mogman]

The STE/ICE bypasses everything, if that does not work, of course check to make sure you have 24V on M and that S has continuity to the solenoid start terminal (wire 74)
If that checks out then you only have the heavy wiring from the batteries to the starter, the ground is just as important as the +24V, many have problems at the negative shunt on the inside of the battery box.

 

[ke6rwj]

The STE/ICE bypasses everything, if that does not work, of course check to make sure you have 24V on M and that S has continuity to the solenoid start terminal (wire 74)
If that checks out then you only have the heavy wiring from the batteries to the starter, the ground is just as important as the +24V, many have problems at the negative shunt on the inside of the battery box.

IC. I'm always a little careful with anything that's new to me.. i have several A0/A1 and several other vehicles and generally will take my time and allow the learning process to continue.. Its important though to find the right documentation. All the references in the manual to STE/ICE don't make that easy.

Incidentally i have a newer STE/ICE system complete with cables and software, but its missing the very important PCMCIA card interface for the computer.. I priced one out ... i could by a new truck for what they wanted..

I fixed a couple fuel leaks and primed the fuel system at the filter housing... it cranks and i get smoke but no sputter yet.. Ill let it rest tonight..

Thanks everyone for the input.

-- Chris