Re: Temperature gauge not working
[Re: DUFFMAN]
#2521773
07/14/18 12:19 PM
07/14/18 12:19 PM
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Posts: 11,269 Slantytown
DUFFMAN
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When I have time I'll remove the radio so I can get at the main connector for the dash so I can inspect the pin for the temp gauge and check continuity to the sensor connector.
I wouldn't be surprised if there is a problem with the board on the back of the cluster. I replaced the board about 3 years ago when I had the column out for the power steering conversion. I replaced it because the connection to the right turn signal indicator was broken.
If I have to replace the board again this time is will be a brand new one. https://www.ebay.com/itm/Mopar-Standard-Dash-Cluster-CIRCUIT-BOARD-71-74-B-Body-NEW-PDD-051/332494993093?hash=item4d6a3ef6c5%3Ag%3A4rIAAOSwyYFaO-Dg%3Asc%3AUSPSPriority%2154911%21US%21-1&_sacat=0&_nkw=mopar+b+body+gauge+cluster&_from=R40&rt=nc&_trksid=p2334524.m570.l1312.R2.TR0.TRC0.A0.H0.Xmopar+b+body+g.TRS2&LH_TitleDesc=0%7C0
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Re: Temperature gauge not working
[Re: Supercuda]
#2521775
07/14/18 12:22 PM
07/14/18 12:22 PM
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Joined: Mar 2005
Posts: 11,269 Slantytown
DUFFMAN
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I wouldn't assume you were getting voltage from the IVR to the gauge unless you verified that. Amp gauge doesn't use it, the fuel gauge does, but you can still have a crack on the board that feeds the gauge. BTDT. The fuel gauge works, so the voltage regulator is good. Since I did have to replace the circuit board once for another problem there's a high probably that's where it is.
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Re: Temperature gauge not working
[Re: Andrewh]
#2521776
07/14/18 12:25 PM
07/14/18 12:25 PM
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Joined: Mar 2005
Posts: 11,269 Slantytown
DUFFMAN
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check with a test light at the sensor and bulkhead and the gauge. you can start with the gauge and work your way forward to find the break.
it should blink. My plan is to remove the radio to get to the main cluster connector then check continuity from the dash to the sensor. If that's good there is a problem in the circuit board. If not, then I'll check continuity from the bulkhead to the to the dash.
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Re: Temperature gauge not working
[Re: DUFFMAN]
#2521786
07/14/18 01:02 PM
07/14/18 01:02 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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Posts: 14,889
up yours
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I wouldn't assume you were getting voltage from the IVR to the gauge unless you verified that. Amp gauge doesn't use it, the fuel gauge does, but you can still have a crack on the board that feeds the gauge. BTDT. The fuel gauge works, so the voltage regulator is good. Since I did have to replace the circuit board once for another problem there's a high probably that's where it is. Just because the fuel gauge works does NOT mean the one of the traces to the temperature gauge doesn't have a crack in it, either from the IVR or from the pin that eventually goes to the sender.
Last edited by Supercuda; 07/14/18 01:02 PM.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Temperature gauge not working
[Re: DUFFMAN]
#2522068
07/15/18 11:10 AM
07/15/18 11:10 AM
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Joined: Mar 2005
Posts: 11,269 Slantytown
DUFFMAN
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It's been hot and humid for the last week so it's hard to spend much time in the garage. I'll bet the radio removed this morning before it gets too hot out so I can check continuity from the cluster connector to the sensor connector. If that's good then the problem must be in the board.
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Re: Temperature gauge not working
[Re: DUFFMAN]
#2522983
07/17/18 10:14 AM
07/17/18 10:14 AM
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Joined: Mar 2005
Posts: 11,269 Slantytown
DUFFMAN
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I haven't had time to perform anymore diagnostics, but I drove the car last night and now my left turn signal indicator isn't working. So the whole left end; temp gauge, indicator, and dash light is dead. This means there's a good chance that there is a problem with the circuit board.
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Re: Temperature gauge not working
[Re: DAYCLONA]
#2523614
07/18/18 02:55 PM
07/18/18 02:55 PM
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Joined: Oct 2015
Posts: 732 Michigan
BlueRacer69
super stock
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super stock
Joined: Oct 2015
Posts: 732
Michigan
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Not wrapping the threads of that sending unit in teflon tape and/or sealer are you?... Yes I used teflon tape. NO tape or sealer on the threads, as this is your ground, this may be your issue or part of it... Sorta curious about this statement. So without any kind of sealant on the threads of sending units ( be it water, oil, or such), how do these things not leak?
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Re: Temperature gauge not working
[Re: stumpy]
#2523680
07/18/18 05:10 PM
07/18/18 05:10 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Just me for permanent out the door work I use a slight bit of sealer on the top half of the threads (just my OCD) then ohm the body to the nearby block to confirm continuity but I have swapped senders/1/8 NPT mini pipes/fittings when doing gauge setup/psi checking/drill priming & no leaks.
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Re: Temperature gauge not working
[Re: DUFFMAN]
#2523807
07/18/18 09:44 PM
07/18/18 09:44 PM
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Joined: Mar 2005
Posts: 11,269 Slantytown
DUFFMAN
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Yes, NPT is tapered thread that in theory should be self sealing. However, since I was installing the sensor into a 48 year old cast iron intake I figured I'd rather be safe than sorry and used a thread sealer. After 48 years the threads in the intake are likely worn and/or pitted.
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