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Gauge Problems, Out Of Ideas

  • Thread starter Thread starter LRoak
  • Start date Start date Aug 29, 2015
L

LRoak

New Member
Jan 2, 2013
13
0
1
Aug 29, 2015
#1
  • Aug 29, 2015
  • #1
Hi, this is my first time posting. I've looked for the next step on the forums but I am out of ideas.

My engine temp guage just pegs to high whenever I hook it up. It worked last year before I tore into the restoration. It's a 65 coupe. Here is what I have done:

I first replaced the sending unit. Tried a few wires and got it working. Go forward a year and now it just pegs at high. I thought maybe there was a short in the wire and it was grounding somewhere along the way. I ran a new wire on the outside of the car and hooked it up. Same result. I thought maybe the voltage limiter was bad, because this is not my only cluster issue, so I replaced the limiter. Same result.

I then pulled a guage out of another 64 coupe to see if it was the guage itself. I got the same result with the other guage.
One thing to note, I thought I was supposed to be getting pulse current out of this limiter but it is just constant, is that the problem?
What can I try next? Any help would be appreciated. Thanks guys.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Aug 30, 2015
#2
  • Aug 30, 2015
  • #2
when you replaced the IVR, did you use one from another panel? or did you get a new one? understand that if you used one from another panel, it might also be bad.
 
L

LRoak

New Member
Jan 2, 2013
13
0
1
Aug 31, 2015
#3
  • Aug 31, 2015
  • #3
Yes, I bought a new one for it.
I actually did try another old one from a different mustang but I got the same results and so I proceeded to buy the new one.
 
R

Rick Rademacher

New Member
Feb 12, 2016
1
0
1
Feb 12, 2016
#4
  • Feb 12, 2016
  • #4
I am having kinda the same problem with my '66. The temp gauge works but oil, amps, and fuel do not. I checked the gauges with a test light and they have power but the test light goes dim then bright, over and over. I replaced the sending units and the wire loom on the engine. What else can I do?
 

tos

Founding Member
Apr 27, 2001
896
68
59
Cincinnati Ohio
Feb 15, 2016
#5
  • Feb 15, 2016
  • #5
Did you hook the ground strap back up that goes from the back of your engine to the frame? make sure its a good tight ground. You should also have a ground point behind the gauge panel to the framework under the dash - make sure it is tight too.
Do you have a digital multimeter so you can see the voltage you are getting at the gauge?
 
R

redneckgearhead

New Member
Mar 29, 2016
12
0
1
Apr 17, 2016
#6
  • Apr 17, 2016
  • #6
Iirc there are insulators where the bolts pass through the gauge mount. I'm wondering if one of them isn't bad?

Sent from my SM-N910V using Tapatalk
 
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