legacycentral bbs

Well, started to resolve some problems with scooby. One of them that makes me nervous a little i temp gauge which has been dead since I had bought car. Temp sensor that is going to ECU is OK - fan kicks in. Temp sender gives about 50 ohms when engine fully warmed. Cant find any info on correct resistance but I guess even if it's incorrect it should kick needle up high - the less resistance the higher the needle. I dismantled instrument cluster and...dunno where to start at. I guess my interest is left plug called A. I have a kind of diagram but can't see what number is above A4. And I still dont know how to check gauge itself. I guess I should check resistance at sender and then at white/green wire at cluster A plug. And if they are equal, what should be next - excluding cluster change? Anyone has similar problem?

If the resistance is the same at the contact for the cluster & at the sender, then you have a wiring issue.

Thx 777.
I'll try to give pure 12 Volts to A4 and third path from temp gauge. As you can see it should be live wire BUT - is this A5???? Looks like A5 but scan isn't perfect.

If needle wont move on up at nearly 0 ohm resistance I will know gauge is faulty. Tell me I am right....please?

I'll have to look at my wiring diagrams. I get lost looking at just those small sections.

What year and model is your car?

Shoot me an email to remind me to look at my wiring diagrams.

These scans should help.

http://www.main.experiencetherave.com/s ... n-USDM.zip