Quick IVR question

[Trump_XLV]

Hello,
I bench tested my new IVR in the cluster yesterday. All lights work on the cluster, and when testing the top pin on the back of the cluster it flashes red. I’ve read that is a good thing.


My question is the two pins to the right of that. The “1 and 2 o’clock pin” makes the IVR have a solid red light. I’m assuming this the fuel and other gauge on the cluster. I assume it’s solid red because it detects it’s getting power but other than that there is nothing making it “work”. I believe if I were to hook up the sending unit, it would start to blink?



Anyways my question is what does a solid red LED light mean on a IVR? This is in my 1972 dodge dart non-rallye dash.

Edit: my father has a working voltage regulator for his dart. We tested the fuel gauge and sender and it did read correctly. So it does work. This test was done before the Ivr came in.

 

[Dana67Dart]

1. go to Mymopar.com and download your car's Factory Service Manual, and electrical diagrams that are available free.
2. watch this video to understand how your gauges work
4. NOTE: The cluster MUST be grounded during testing
5. ALL Light bulbs in the dash (the car for that matter) DO NOT have any interaction with the IVR
6. the typical test resistance for testing gauges is 10 ohms for Full, Hot or 60psi or what ever the oil pressure gauge shows as the highest reading. 23 ohms is mid gauge, needle in the middle of the gauges face, 72 ohms is Empty, Cold, 0psi
7. look at the back of the carboard and trace out the pins to understand what each pin does.

 

[Trump_XLV]

1. go to Mymopar.com and download your car's Factory Service Manual, and electrical diagrams that are available free.
2. watch this video to understand how your gauges work
4. NOTE: The cluster MUST be grounded during testing
5. ALL Light bulbs in the dash (the car for that matter) DO NOT have any interaction with the IVR
6. the typical test resistance for testing gauges is 10 ohms for Full, Hot or 60psi or what ever the oil pressure gauge shows as the highest reading. 23 ohms is mid gauge, needle in the middle of the gauges face, 72 ohms is Empty, Cold, 0psi
7. look at the back of the carboard and trace out the pins to understand what each pin does.

View attachment 1716489001

Thank you. I’ve done most of this except for the oil and thermostat gauges. I have different gauges for those. The fuel gauge worked as intended when we hooked everything up in the car and moved the sender by hand.

I’m interested in knowing what the solid red led light means on rte’s Ivrs. I’ve read on their site that blinking red means working as intended. But, nothing about a solid red light. I bench tested by putting a lead to the ground then using the other lead to touch each individual pin on the back while also using a pen that lights up to indicate power to see if the gauges are getting power (they are).

I’ve read most people just see the blinking red light. Mine blinks when I touch the 12 o clock pin. The other two stay solid red. My thinking is if bench tested these clusters and touched one individual it would do what it’s doing. But when plugging the harness up and it’s on the car you would on the see the blinking red light. If I’m not mistaken the 12 o clock pin is the power to the cluster. Which would make sense why the other two is red when touching the pins. I think it’s saying hey I read this. There’s a connection here but no power. Add the 12 o clock pin with the other two then it would blink because it’s getting power.


Sorry for the rambling. I’m typing and thinking as I go.

 

[Dana67Dart]

Follow the traces

1. Goes to the brake light
2. Goes to the oil light
3. 12V power for IVR and for Brake and Oil lights
4. Goes to fuel sender
5. Goes to the temp sender
6. Goes to dash illumination
7. Goes to high beam light
8. Goes to left turn signal light
9. Goes to right turn signal light
10. Wherever a mounting screw goes through a trace is ground

as for the red light on the RTE IVR

"5) There is a small LED that will flash when the limiter is operating properly. You should be able see the LED reflecting off the circuit board. If the LED is off all the time, it may mean that one of the gauges is shorted to ground. The limiter is short circuit protected, and once the short is removed, then the limiter will resume operation. "

They don't say what a solid red led means BUT the limiter MUST be grounded to function properly. Call RTE in the morning.