BRUISER

hey guys,

I need to find out what ohms the resistor on the back of the guage cluster is.

in other words if you were to take out your gauge cluster out of a '92 and flipped it around you would see a silver square resistor on it.. if someone knows what it is set for that woul dbe great, if not and someone could use a voltmeter to check the ohms on it, that would be awesome also.

thanks for any help

Crossy's son

I have like 4 diesel clusters out of trucks,

i'll try

BRUISER

thanks I really appreciate it..

as long as you can get it close then I can go to radio shack and get some resistors in a close range..

Crossy's son

the cluster is in front of me and its flipped over NOT APART and i dont see the silver square.

Crossy's son

BRUISER

well crap.. on my '85 the resistor is on the back of the dash.. I figured it was for the '92 also..


thanks for taking the time.. now I need to figure out where the resistor is on a '92

the gist of my issue.. is the fuel gauge will not read correct because I need to figure out what resistance it needs to read correct.
IE: trying to figure what where the resistor is..

johny5

oh this could be a problem for me , but im running the 85 tank and 93 gadge

Jim Lane

As far as I can see there is no voltage regulator or resistor on my 91 cluster.

All of the senders go to ground.

I wanted to find one also, the only electronics were in the information center.
Jim

draginbottom

Pretty sure the resistor is actually on the sending unit in the tank. It should be a variable resistor that changes with the fuel level in the tank. Not 100% sure just an educated guess.

SMoKeNU

Pretty sure your right. A universal is 0 ohms empty 90 ohms full. You can easily test this if your dropped the tank or found another sending unit to test out of the truck.

Chris

jimbo486

the resistor usually IS on the pick up in the tank. it reads the position or level of the float arm

Jim Lane

I am not sure what you were looking at on your old cluster but if it looks like a circuit breaker only about half as thick, they used to use a voltage regulator to drop the voltage for the gauges, I think they were a vibrating type.

http://1962to1965mopar.ornocar.org/m...gulator64.html

http://www.mopar1.us/instrument.html

Check towards the bottom of this page.
http://www.gcartrim.com/Instrument%20Clusters.htm

As far as I know they do not use them anymore, I f I remember correctly I measured 12 volts at the rear of the gauge.
Jim

BRUISER

ok I drew up a very bad drawing of how my fuel gauge is wired

sending unit has 4 wires..
1 low fuel (not hooked up)
1 ground
2 together are power

guage in dash has 3 wires
1 connects to power in sending unit
1 connects to 12 volt power
1 is ground.

I think there needs to be a resistor on the 12 volt power from battery to gauge in dash.

also if i lift the sending unit ground of chassis the guage will go to FULL
then if i reconnect it, and lift ground of gauge side it will go to empty.. so the gauge does work and move.. I just can not get it to read correct when everythign is connected.. if both grounds are connect gauge stays at 1/4 tank no matter how much fuel is in tank.

Trebor

For some reason the newer gauges with the electric speedo will read 1/4 full if there is a break in the connection going to the tank. I noticed this whenever I had hooked up a temporary test gauge to check the accuracy of the in dash gauge a few years ago.