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05-24-2005, 05:55 AM
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#1 |
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Registered Member
Join Date: May 2005
Posts: 12
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instrument voltage regulator
IVR provides fluctuating voltage to gauge cluster in order to run the fuel, oil, temp an ammeter. When the gauges are disconnected, the proper voltage is there, connect gauges and its gone. Gauges read good according to my meter (even swapped gauges with no luck). Can't find any grounds to cluster housing or anywhere else.
In the prcocess of insulating gauges ad cluster as good as I can, we'll see. Any thoughts? |
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05-25-2005, 12:20 AM
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#2 |
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cranky old man
Join Date: Sep 2001
Location: Longview Texas
Posts: 683
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Re: instrument voltage regulator
Bad ground ?
Bad connection, dropping so much voltage the IVR can't compensate ?? Thats a tough one. Rod
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Under Construction: 64 Falcon 372 cu in. stroker 1:72 rod ratio 6.250" rods (long rod), Comp Cams XE274 230/236 520/526 @ .050, Scorpion Rollers, Roush 200 irons, 10:1 Keith Blacks, Hedman long tubes, 750 Holley DP, Edelbrock Victor Jr., C4 3500 stall, gears and tires to be anounced. |
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05-25-2005, 06:44 PM
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#3 |
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Factoy Five Roadster
Join Date: May 2000
Location: Sevier Co,Tennessee
Posts: 1,681
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Re: instrument voltage regulator
What are we working on?
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Frank |
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05-26-2005, 06:55 AM
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#4 |
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Registered Member
Join Date: May 2005
Posts: 12
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Re: instrument voltage regulator
Sorry, 70 fastback, 351w.
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05-26-2005, 08:57 AM
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#5 |
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Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
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Re: instrument voltage regulator
To clarify: When the IVR is unconnected to the gauges, and running, you get a current of x-y value? (I forget what it is for a 66, and don't know for a 70)
Then you connect them and the ivr is dead, i.e no voltage on the *input* side? Or is it just that the voltage drops?
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
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05-26-2005, 09:16 AM
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#6 |
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Registered Member
Join Date: May 2005
Posts: 12
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Re: instrument voltage regulator
The IVR is supposed to provide a fluctuating 5 volts (flucutes due to opening and closing of IVR) to the gauges. The 5 volts is there until the fuel and or temp gauge is introduced to the circuit. Then the voltage disappears. i can't find any grounds, gauge cluster is isolated from rest of car so i feel the problem is definately within the cluster.
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05-27-2005, 07:13 AM
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#7 |
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Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
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Re: instrument voltage regulator
I would say just replace the printed circut board. Theres a couple of companies that sell them.
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
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05-27-2005, 08:43 AM
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#8 |
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Registered Member
Join Date: May 2005
Posts: 12
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Re: instrument voltage regulator
unfortunately I have, the old one was fried. Just have to keep looking.
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05-27-2005, 09:17 AM
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#9 |
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Registered Member
Join Date: Jun 2000
Location: Pigeon Forge Tn
Posts: 611
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Re: instrument voltage regulator
So...If it works ok jumping those gauges, i.e. connecting the input and output for a particular gauge, ....
Maybe the sheet is grounding somewhere? Dunno, thats odd.
__________________
____________ '66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit* '93 GT Mostly stock AKA "Fawkes" Rice Haters Club Member #239 "I find your lack of faith...disturbing." "Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken |
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05-31-2005, 07:37 AM
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#10 |
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Registered Member
Join Date: May 2005
Posts: 12
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Re: instrument voltage regulator
Thanks for your input, think I finally nailed it. Don't know what but something was grounding out to gauge housing. Sprayed it with an insulating laquer and that seemed to fix it for now. We'll see.
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