Dash electrical DEMONS!!
#1587641
03/03/14 09:36 PM
03/03/14 09:36 PM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
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OP
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Tracy CA
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Okay, I have a '67 Valiant, none of the dash stuff was working when I bought it except the AMP gauge and SPEEDO. Then one day I hit a bump and WAH-LA! The gas gauge started working, along with the BRAKE lamp. It was glorious for several outings then stopped working. A few bumps later, they work. Then it stopped. Then it worked again. So I've got intermittent grounding issues. The MILLION DOLLAR Question...  How do I fix this? Can I add an auxillary ground to the dash panel? Muchos gracias, a thousand thank yous, blessed be the one(s) who can answer my most (un)grievous question!!  
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Re: Dash electrical DEMONS!!
[Re: rabid scott]
#1587642
03/03/14 09:38 PM
03/03/14 09:38 PM
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Joined: Nov 2005
Posts: 15,119
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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On my 66 coronet it was the gas tank ground causing an open circuit.
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: Dash electrical DEMONS!!
[Re: moparpollack]
#1587643
03/03/14 09:42 PM
03/03/14 09:42 PM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
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Quote:
On my 66 coronet it was the gas tank ground causing an open circuit.
Does the BRAKE light circuit use the Fuel tank circuit as a ground as well? The two would either work together, or would not together as group. I'm assuming if the water temp gauge/sender worked it would or wouldn't work too.
How much would could a "Would Chuck?" would, if a "Would Chuck?" could Chuck Would? Hahaha... now I'm just getting off topic.... Hehehe.... 
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Re: Dash electrical DEMONS!!
[Re: rabid scott]
#1587645
03/03/14 10:00 PM
03/03/14 10:00 PM
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Joined: Nov 2005
Posts: 15,119
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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At this point clean them all! And when you are done stop by my house I can't get the gas gage to work in my D150. 
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: Dash electrical DEMONS!!
[Re: cjskotni]
#1587646
03/03/14 10:29 PM
03/03/14 10:29 PM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
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Quote:
When you say 'brake lamp', do you mean the light that lights up when you have the e-brake engaged?
Yep, that's one. It also glows a nice cherry red when the rear brake fluid is gone. 
Quote:
I would pull the gauge cluster and verify the voltage regulator (little box on back) is well-grounded...
That's what I was afraid of. Poop. No way of getting around it, I can't run a test jumper to ground out something? A temporary fix I can use permanently?
This car suffers from "Previous Owner Syndrome" because the homeboy "refinished" the dash assembly as well as a number of other choice "repairs".  
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Re: Dash electrical DEMONS!!
[Re: NITROUSN]
#1587649
03/04/14 02:58 AM
03/04/14 02:58 AM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
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Quote:
Quote:
Try tightening the screws that hold the instrument cluster to the dash.
Thats to easy.... 
That was the first thing I tried!
I was contemplating a gas gauge to hang under the dash 'cuz they're only $20 but I fingered I may as well and try a fixn'er right first. 
After that works, I can try and find the source of the brake fluid leak.... 
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Re: Dash electrical DEMONS!!
[Re: Andrewh]
#1587651
03/04/14 07:58 PM
03/04/14 07:58 PM
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Joined: Feb 2003
Posts: 4,796
Castlegar, BC, Canada
That AMC Guy
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Joined: Feb 2003
Posts: 4,796
Castlegar, BC, Canada
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I'd take the cluster out to inspect what's going on. A lot of times, the pins on the board that go into the harness connector are loose or broken.
You can either solder the pins to the board (traditional route) or a friend of mine came up with an even better idea was to use tiny machine screws in the backside of the pin. That stretches the pin out and makes it much tighter in the board but also gives you that solid mechanical lock.
I'm now thinking a combination of screws & solder would make it so you'll never have to pull a cluster again!
Oh, and I also second the vote for adding a secondary ground wire/strap.
Bloody Mary, Full of Vodka, Blessed art thou among cocktails....
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