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PostPosted: Wed Oct 30, 2019 2:31 pm 
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2 BBL ''SuperSix''

Joined: Sun Oct 06, 2019 1:00 pm
Posts: 15
Car Model: 76 Aspen
Filled up my 76 Aspen yesterday and both gauges worked. Today I went for a ride and neither worked. Checked fuses and all seemed good, any ideas.


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PostPosted: Wed Oct 30, 2019 5:05 pm 
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Board Sponsor
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Joined: Tue Oct 29, 2002 8:27 pm
Posts: 9760
Location: Salem, OR
Car Model:
Time to check the sensors and wiring, temp sensor at front of head near T-stat housing wire goes from there down the pass side of valve cover and over to the fender then off to the firewall, Fuel Level can have the ground strap rust off between the tank nipple and the main gas line at the body, it also has a nice wire that goes through a plug in the trunk pan, up behind the back seay and drivers side wheel well, then down the driver's side door rail under the carpet to the kick panel and dash.... you also could have an issue with the circuit board on the instrument cluster (the brass/copper paths do corrode and decay with moisture and lack of use), and the gauges could give up the ghost if they got a spike in voltage...

Now would be a good time to invest in the 1976 Mopar Field Service Manual and Electrical Manual (some versions in 1976 had both combined in to one book), they have the full wiring diagrams, wire color and gauge and connectors, so you can trace the circuit out. Luckily 1976 isn't a favorite year, so you can get the manuals on Ebay pretty Cheap.

Good Luck!


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PostPosted: Thu Oct 31, 2019 5:38 am 
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Turbo EFI
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Joined: Tue Feb 18, 2003 7:34 am
Posts: 2478
Location: Lubbock, Texas
Car Model: 1964 Plymouth Valiant V200 Sedan
I'm not familiar with the Aspen wiring, but could both gauges going out at the same time indicate an issue with the instrument voltage regulator, as on earlier cars?

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO


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PostPosted: Thu Oct 31, 2019 9:53 am 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24233
Location: North America
Car Model:
Yes, this is the classic symptom of a dead ICVR. Get this one.

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PostPosted: Fri Nov 01, 2019 7:49 am 
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2 BBL ''SuperSix''

Joined: Sun Oct 06, 2019 1:00 pm
Posts: 15
Car Model: 76 Aspen
So are the gauges history.


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PostPosted: Fri Nov 01, 2019 8:51 am 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24233
Location: North America
Car Model:
If the ICVR failed one way (points stuck closed and sent 12v to gauges) then they would have both pegged, cooked, and died. If it failed the other way (open circuit) or if it's some related problem (faulty circuit board or similar) then they should be fine.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

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PostPosted: Fri Nov 01, 2019 10:44 am 
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2 BBL ''SuperSix''

Joined: Sun Oct 06, 2019 1:00 pm
Posts: 15
Car Model: 76 Aspen
Not pegged. think I lucked out. Ordered the part you suggested, thanks.


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