1987 D4H series II gauges mechanical or Electronic..dead either way

Warning lights and fault light with beeper works, but gauges are dead. Got a few questions before i tear into the dash panel.

Are gauges and lights all 24v. or 12v. (yes its 24v. system) I have no wiring diagram for this to go by.

Horn fuse is missing, does this circuit maybe provide power for gauges? Or is there 1 fuse that feeds all the dash functions?

All lights are missing, backup beeper disabled (switch trashed) horn trashed too. Are these all 24v. or 12v.

Want to add cheapo backup camera/tv for monitoring ripper (up/down) since i cant see **** whats going on so close to the back of the dozer. Want to add LED lights too all 12v. So can i just tap one 12v battery for this...or will i have backfeed/ short circuit issues.

Also i have no gauge cover. Thinking of fabbing one that swings up and forward over the top of the dash. Ive seen others like this....do they rattle around? i have enuff vibrating noise now in different areas while operating.

Thanks in advance

If you want an electrical schematic that suits your tractor you'll need to supply a Serial Number.

oops my bad.....ser# 8PB 01320

Gauges are electrical and 24 volt

Nige must be working, I remember doing that!, so I'll attach the wiring diagram here:
"Sorry about misspelling schematic in the file name!"

I have a 1992 d4h mine is 12 volt if you want to run 12 volt accessories the 24 volt system you can go on Amazon and buy a 24 to 12 volt converter they are $30 bucks for a cheap one and a lot of the LED lights can handle 24 volts it will say it on the back of the light

That was a good idea.

PEVO said:

Also i have no gauge cover. Thinking of fabbing one that swings up and forward over the top of the dash. Ive seen others like this....do they rattle around? i have enuff vibrating noise now in different areas while operating.

Click to expand...

Attached is drawing of the factory design of gauge cover might give you some ideas of one.

My 8pb06217 has the 5G9980 vandalism guard group. You unlock bottom, flip it over, and plunger 7 snaps into socket 2.

thanks for all your responses/info. Ill update when i dig into it.

You have a fuse box behind the panel for your steering levers. The old twist lock fuse holders can corrode and not make contact.

Use a 24-12 converter for your camera and make sure power is protected by a fuse.

The 24-12 volt converter is the way to go if yo want to use 12v devices. If you hook to one battery to make 12 v, the other battery will be cooked as it will be fully charged while the other one is charging.