BJ74 Electrical Question: Oil Pressure Gauge (1 Viewer)

[gifu]

my BJ74 came with a bad oil pressure gauge. In fact, the PO's post regarding it is still on Mud. Anyway, I have replaced the sending unit and the gauge... and it still doesn't work.

When I pulled the old gauge out, it was melted.

If I pull the sending unit wire off, I do not measure a short to ground. So, I am assuming the wire from the cluster to the (new) sender is fine.

Questions:
what is the resistor for on the back of the gauge cluster?
What resistance should I measure at the sending unit?
What else can I check?

thanks!

 

[Eric Winkworth]

Mine did something similar, I ended up not using the inaccurate 20 year old gauge and using an isspro mechanical oil pressure gauge instead... It's awesome to know the actual PSI of your oil pressure, and I'm not relying on some electrical sender to "WORK" which after 20 years some have discovered it's quite common they don't..... WORK that is

 

[Hulsty]

Mine had a similar problem, the PO took out original sender and guage needle, fitted up a new sender and seprate gauge which works well, its surprising how long it takes for oil warm up and thin out compared to the water temp!