MoPowa

Ok so I got my 4000rpm Isspro gauge in today and starting wiring everything up using the instructions in the sticky https://www.dieseltruckresource.com/...58&postcount=3
Got everything wired up turned the truck on had power to the gauge light, but the gauge is not picking up a signal. Hmmmmm
I checked all connections and everything is connected right, but as I looked closely at the sticky I realized that there is some sort of fuse crossed out for the white signal wire to the gray wire. (Instructions for a 3 3/8" gauge) Before I go any further I just wanted to make sure that not having the fuse for my signal wire is infact the problem?

Thanks for any input

thrashingcows

Sorry I can't help you directly with experience with this problem.

Looks to me from the diagram that you don't want that fuse, or filter, just remove, or bypass it and hook the white or yellow to the gray in the connector?

MoPowa

Right now I have it connected without the fuse, white(yellow) directly to grey. I hooked a test light up to the black(red) and white wire and I am getting no signal, which leads me to believe maybe I damaged the computer. Only thing I am getting power to is the orange wire for power to the gauge light. My check engine light does not go off anymore either, so I think this may be my problem

thrashingcows

That is not good...Hope you didn't fry your computer....

MoPowa

Sorry my bad, the check engine light doesn't stay in its the E-brake and anti lock light that stays on. Before all of this they would always go out, I don't know if thats telling me something. Can someone tell me if a test light should pick up a signal from the black(red) and white wires while engine is running?

MoPowa

A little more trouble shooting later, my blinkers don't work now and when I turn my headlights on my radio light goes dim. Leads me to believe I have a ground problem now....ah I hate wiring

MoPowa

I have no idea what this is but I noticed that it was getting REALLY hot, I disconnected the battery and it would cool down. I don't know if it means anything....


Right now I have everything from the Tach disconnected, and the e-brake, anti-lock lights don't go out, blinkers don't work (hazards do), when headlights turned on radio light goes dim, ac works still, overdrive works, all fuses are good.

thrashingcows

That little aluminum cylinder is a thermal timer, so to speak. It's probably for your ignition light or some other option that requires a timed "on" period.

Here's how it works say for your ignition lamp, when you open your door the doom light comes on, and then the power to this relay begins. At the same time the ignition lamp will come on. Once you close your door the dome light goes off and the power to this relay stops, BUT, due to the thermal energy it has stored it will continue to power the ignition lamp for another few seconds. The time is relevant to how long the door was open, but the relay will reach a point where it can no longer store anymore energy and this is the longest it can run the ignition lamp.

So if your door has been open for a while this relay will get hot!!

#2isgreen

I don't know about all the other problems yer having, but for the tach I needed to use the "filter" in the wire harness that came with it. Nobody seems to know what this magic "filter" does but it was the only way I could get my tack to work. I tried making my own connections first with thermostat wire but the needle would jump when I fired the truck and then go dead.

Good luck

deanhinsley1963

the radio lights dimming with the lights on is normal.

MoPowa

Alright so I can scratch that off my list

Thanks 2isgreen, its funny because when I first had it wire up it did that exact thing...would jump than go dead. So that was probably all I needed in hte beginning for that. Unfortunately trying to figure out if maybe I got the 2 black wires one being ground and one being power mixed up and I switched them I think I cooked something I'll have to make another thread do see if anyone can tell me if I cooked my computer

Thanks guys

#2isgreen

I had my black wires backwards during my install too. And I ran the truck like that and didn't fry anything. Did you get the steering column pod mount? Let me know if the gauge fits mine didn't and I ended up with a heat gun and leather gloves stretching the plastic to fit the gauge.
Again, good luck

Onemoparnut

Start the truck and see if it is charging or if the a/c works. Also if it Is auto if od doesn't work that will also be a sign of a bad computer

MoPowa

Ac works, seems to be charging as well, I'll go out right now and see if the od works.

hey #2isgreen the column wasn't the best fit in the world but I did manage to make it work, just used the stick tape and 4 plasitc inserts in the kit