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Author
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Topic: 65 w/ 66 Gauges?
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Mooney
Gearhead Posts: 2357
From: Marietta, Ga
Registered: Oct 2003
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posted 01-04-2006 05:54 PM
 
PO replaced standard 65 gauges with 66 gauges, a couple of the gauges aren't working (fuel,temp,oil). Is the under-dash wiring completely different and not compatible w/ the 66 gauges or should it all work if connected properly? Haven't had a chance to remove and take a look yet just wanted to see if it would even work. Went ahead and ordered an engine gauge feed harness; PO had tapped into it about 6 different times for various wires here and there, maybe that'll cure some of the gauges?Hoping to almost be done with everything this guy has worked on. Seems like every part of the car hes touched hes messed up. Thankfully he didn't do the breaks or the rear end. Luke
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 01-04-2006 07:00 PM
I think they are the same except for the amp gauge.Wiring for a 66, http://www.ukstang.pwp.blueyonder.co.uk/wire.htm ------------------
oddly obsessed with big scoops on little Mustangs HOOD HACKERS DELIGHT!
My Pics
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Scott H
Gearhead Posts: 1480
From: Chicago area
Registered: Mar 2005
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posted 01-04-2006 07:47 PM
The fuel gauge and the temp gauge would be the same wires. The oil uses a light bulb in 65 and two wires in 66, and the sending unit is different.When you have three gauges not working, the most common source of the problem is the one thing all three have in common - the instrument cluster voltage regulator. Other than that, those three gauges will all ground via their respective sending units. The sending unit is a resisitance to ground, in other words a full ground which offers no resistance would indicate full (or hot, or high pressure) on the gauge.
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 01-04-2006 07:56 PM
What Scott said goes for me too.  ------------------
oddly obsessed with big scoops on little Mustangs HOOD HACKERS DELIGHT!
My Pics
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gmliebau
Gearhead Posts: 691
From: Port St. Lucie, FL
Registered: Jan 2004
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posted 01-05-2006 03:58 PM
I did the same thing to my '65. Scott's right. The fuel and temp guages hook up the same way as the original. If you are using the instrument voltage regulator from the original cluster, and it worked, then you've got issues somewhere else.Give this link a try: http://www.treasurecoastmustangs.com/changing65dashto66dash.doc
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Mooney
Gearhead Posts: 2357
From: Marietta, Ga
Registered: Oct 2003
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posted 01-05-2006 06:42 PM
Thanks for the links and the info!
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