M920 Volt meter wiring - Page 2 - Steel Soldiers::Military Vehicles Supersite

M920 · 02-07-2011, 00:36

Quote:

Originally Posted by jamboly

I think the pieces of the puzzle are coming together. Based on the comments I have received above and JATONKA posting the -20-3 with wiring diagram fold outs (very quickly I might add. great work), I have concluded that I need to move the two black wires from the dash voltmeter gauge bracket to the voltmeter input lug. (M920, the wires that I needed to add to the gauge are ground wires, not 12V. The blue/black wires that run to each of the gauges provides the 12V to the gauges.) I will try to make this change tomorrow and report back on how much smoke I generate.

Jim

Jim,

I'm sorry....I told you wrong and you are correct. I for some reason had it all backwards. I just went and looked on my 916 and those two wires do go to the empty post on your volt meter!

My bad....should have went and looked before I opened my mouth...

Soni

jamboly · 02-07-2011, 11:58

Okay, rather than moving wires and maybe breaking something else, I made a jumper wire to go between the voltmeter gauge input and the terminal on the gauge bracket where the two black wires were attached. No smoke. The gauge worked and the truck started just fine. Only issue is that voltmeter gauge was reading a little over a volt less than what the batteries were putting out (verified gauge voltage reading with a digital voltmeter). Looks like I have something causing a voltage drop. However, right now I think I am going to put my head in the sand on the voltage drop and start working the no charge issue. (I am sure that will cost a lot more to fix than the jumper wire. And yes, in regards to the voltage drop, I realize that those kinds of issues usually result in thermal events with visual effects.

Thanks again for every ones help.
Jim

crownfire · 03-08-2011, 17:26

How do you get the wiring diagrams to download. I see that they're supposed to be there but I can't see them.

R Racing · 03-08-2011, 18:57

Hi Crownfire its a PDF file.

Jamboly, Mine does the same thing it reads a volt less. Also check your cigar lighter recptical. mine had something broke off in it and was a slow discharge on my batteries. Before I found it I put a battery disconnect on the 12v lead.

rlwm211 · 03-08-2011, 19:08

The full vehicle diagrams are in the TM indicated and are in the back of that TM. The system diagrams are in the TM indicated and are more for diagnostic work than tracing wires.

RL