The cluster is out, you won't believe what I found
Hi 76dart273. Can u show how you wired into a battery i want to test the gauges like u did. 2 D batteries would give 3v right? Is that all the gauge needs to go full?
Really that is just a quick and dirty test. Yes, two batteries. You need "big" ones D is what you should use.
"In reality" they should be tested "in circuit" with resistors. That is, a working IVR, and a sender or test resistor so you can see what it does. You can use an ohmeter to adjust your fuel sender out of the tank, or buy some resistors
These resistances are based on the old Chrysler shop test tool (see the manual)
L = 73.7 Ohms (empty)
M = 23.0 Ohms (1/2)
H = 10.2 Ohms (full)
All the gauges are same, fuel, temp, oil if equipped.
Also remember that the IVR whether factory or modern solid state, must have a ground.
So you need battt +12 to the switched ignition terminal on the cluster
NEG 12 to the cluster ground
And then wire the resistors above one at a time from the sender terminal to batt NEG
Prop the cluster up at approx correct viewing angle, and allow them to set a minute under power to stabilize
