isuzu trooper 2.8 td (4jb1) workshop manual

[damo667]

does any one have a wiring diagram/manual for the 1990 bighorn I'm fitting a boost gauge tomorrow and it would save me a lot of time.. cheers

[geeves]

Dont need a wiring diagram for a boost gauge unless you want the light to work. Just connect this wire to and bulb in the dash and it will work

[damo667]

I bought a gauge thats dark when not in use (dont know why) its got three wires, constant power & negative plus another wire connects to headlight dimmer to brighten up at night.
should be able to connect them all to the headlight switch as they all reach perfectly I've just gotta find the right wires.
might just go for good old fashioned trial & error..

[geeves]

I keep meaniing to hook the light up in my gauge. Its been on the list 5 years. Still not done

[damo667]

Haha is it a long list?.
just got mine all hooked up.. I'm a bit confused though..
I connected the earth up followed by the orange to the 12v lighting as instructed.. then the third red wire to the ignition..
but all the lights on the gauges come on with the ignition and dont change when the headlights go on.. so cant understand what the orangevwire connected to the 12v lighting was for!!..

Oh well they all seem to work so I'm going to forget about it for now haha..

[muzila]

Its ment to hook into the dimmer circut so when you dim your dash lights it dimms with them.

[damo667]

Does that mean that when you turn the headlights off it should dim?..

[Captcol]

nah other way around headlights on it should go dimmer so that it doesn't blind you, or it will only turn the light on with the headlights

[Captcol]

nah other way around headlights on it should go dimmer so that it doesn't blind you, or it will only turn the light on with the headlights

[damo667]

Ah that makes sense now..
It didn't come with instructions.. I presumed before I got it that the numbers would light up with the ignition and the back light with the lights but when that didn't happen I got confused.. (easily done ha)
That explains everything.. I will reroute the orange wire at weekend..

Cheers..