SRT_DSTRHOLC
Well-Known Member
Just Read all of this. I can't believe no one looked for this. http://www.forabodiesonly.com/mopar/archive/index.php/t-157182.html
I am stumped. I should get in line.
I have had the modification working on the bench and temporary halfway installed in the dash. But as soon as I put the cluster into the dash, the darn thing stops functioning. I am not going to let this be, I am going to get the modification working installed in the car.
What modification ?
4 different times I have gotten the dash cluster working just fine until I put it back into the dash. then nothing works properly, even the lights are haywire
All the senders operate on the same range of 10 to 80 ohms except for the warning lamp senders/switches that open /infinite or closed/zero ohms. 1.4 ohms suggests a bad or wrong type sender.
What instrument panel is this ?
What IVR is supplying on 3 volts ?
Yes these the temp and fuel gauges are basically operating as an ammeter. They are configured to measure the amount of current running thru them.
When I got the car there were at lease 15-20 wires running somewhere that were not connected in the correct place or not connected at all. The coolant temp sensor was connected to a wire that ran directly thru the firewall and then not connected to anything. The coolant sending unit has 1.4k (1,400) ohms thru it. The oil pressure sensor what not connected to anything. I found a wire about a foot away that was covered in grease. When I traced it I found it went to the oil press sender.
The instrument panel is what I call the instrument cluster.
you mention the IVR, I am not familiar with that abbreviation.
I still need to find the voltage drop I measure on the cluster PCB.
The car is drivable and the engine runs great, I still need to finish checking the wiring to the a/c blower motor switch so I can charge the ac
Gauges do go bad...I have a new sending unit and good grounds, but My gauge is goofy, have not replaced it. Full is full, and when first hits empty is half a tank. It drove the guy I work with on my car nuts, he is OCD and and was ready to explode. He adjusted the sending unit to do what it is currently doing, which will kill the gauge faster, oh well. I just keep track of when I fill the tank go 200 mile ans refill.
As long as the sending unit is good and grounds are good. Check Gauge they are old...and do fail.