PERFECT!
- 3-4ohms is a bit high but not life shattering. running a dedicated ground will eliminate that. report back after.
- I suspect the same result as 3 and 4 ( fingers crossed)
- if you disconnected the wire from the sender then you do not have a short in the sender wire wire
- if you disconnected the wire from the sender then you do not have a short in the sender wire wire
- did seller sell them as fully functional? and are they OEM or reproduction's? Gold member status is purchased, means nothing about the person selling stuff
- Perfect!
- the 3V battery will show that the gauge can move but does not show that the gauge is accurate.
AFTER you do some testing with the new ground if you still get the same issue I would pull the dash
I would suspect the IVR
The internal IVR can be tested, there are 3 posts on the back of the fuel gauge one, if you follow the trace is the 12V feed, one is the 5-6V pulsed DC output from the IVR that will also be common to one post on the Temp and fuel gauge. the 3rd post will go to the sender.
If you apply 12v to the 12v post and ground to the metal of the cluster and apply a 23 ohm resister between the sender post and ground (metal of the cluster) you should see a pulsed DC (an analog volt meter would be best) on the IVR post. if you see 12V steady for more than a second or 2 disconnect the 12V (that would indicate a bad IVR)
As seen from the back of the cluster
View attachment 1715838639
Internal IVR replacement instructions from RT-Eng
RTE Gauge Faq - rte
the red arrow pointing to the bend in the IVR arm is how RT-Eng says to disable the internal IVR
View attachment 1715838645
notice how long the 12 volts stays solid when the voltage is first applied. that is the heater coil heating up then the flashing is the bimetal making and braking the connection. the volt meter being digital has a hard time displaying anything because it is either 12V or 0 volts as the contact makes and breaks
In this video the lightbulb simulated the load of the gauges and the sender.
https://photos.app.goo.gl/h6j4eeww3SAhGiSn9
https://photos.app.goo.gl/2soBNRgGJUjE1F5fA
