Clylinder Block Temp

[RR383]

Gentlemen...Where on the 383 did they sense temperature in the cylinder block for the factory gauge? BTW, all my gauges are working except the temp. thanks

 

[Ranger]

It's on the front of the WP housing, just below the heater hose.

 

[69hemibeep]

Yep

 

[RR383]

I'll take a look to see whats going on...thanks again

 

[Big John]

When you find the wire and you want to check the gauge, put a 10 ohm resistor between the the wire and a good ground. You gauge should read "hot". If it doesn't read, it's the wiring or the gauge. If it reads "Hot", then it's the sender.

BTW, since your gas gauge works, you can also rule out the 5 volt regulator under the dash as faulty.

 

[RR383]

Great advice...BJ

 

[69hemibeep]

Now that I like, BJ

 

[RR383]

Hey John...I finally got around to testing my stock temp gauge using the 10 ohm resistor as you instructed. Zero results. For the record...the sender appears it has been replaced in the not so distant past. The brass still has a shine. I took some ohm readings to check for continuity between wire boot and ground....then the sender to ground....but nothing definitive.
Soooooooo............next move?????????

 

[Big John]

It might be the gauge. I would start looking at the wiring to the gauge first by tracing the wire up to the firewall plug and then up to the dash.

I never messed with the 70 "rallye" dash, so I'm shooting a little bit in the dark here, but does anyone know if that has a printed circuit board on the back like a 69?? If so, that is a possible culprit.

 

[RR383]

It would more than likely have a board to convert the signal...correct?

 

[Big John]

It would more than likely have a board to convert the signal...correct?

No, the board is just a convenient way of wiring the lamps and gauges. No real "electronics". I don't know if a 70 has this board or not.

The runs on the board tend to have some issues over the years. The reason I mention this is you've mentioned a problem with your clock too.

 

[mac]

hopefully this is from a b body.

 

[RR383]

Looks like I'll need to familiarize myself with backside of a '70 rallye dash. Again, everything else in the dash except the clock is working as it should.

 

[Big John]

See those pins? There's a plug that goes on them. I'd reach up behind the dash and make sure that's pushed all the way on.

 

[RR383]

See those pins? There's a plug that goes on them. I'd reach up behind the dash and make sure that's pushed all the way on.

I'll give it a go.