Voltmeter bouncing - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 07-22-2014, 08:59 AM Thread Starter
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Voltmeter bouncing

Ok I have replaced batteries. Alternator. Tensioner pulley and one of the idler pulleys. None of those for this reason. They were all just wore out. Ok now my voltmeter will bounce very slightly. In the "normal" range it will bounce like between the m and a. Never does it move off those two letters. Just bounces back and forth. This also causes the battery light to come on. The battery light will come on for like half a second. It will just flash on and off. Need some help.



1997 f350 4x4 off road.
353k miles
Stage 1 swamp injectors. TS chip. Leveled on 35" Federal tires and black 18 inch pro comp wheels
3" downpipe into 5" straight pipe 6" tip. (Diamond eye)

1987 Chevy 1ton lifted 24 inches on 53s. Duece and a half transfer case. Mud truck.
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post #2 of 10 Old 07-22-2014, 09:07 AM
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Check the wiring to the alt both power and signal side. may be loose or bad

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post #3 of 10 Old 07-22-2014, 09:13 AM
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Check a 10 or 5 amp fuse under the hood. I just can't remember the spot or the amp that it is.

1996 F350 4X4 CCLB SRW
Full Force Stage 1.5-Swamps IDM-Efuel-Bosch 17* HPOP-Melling LPOP-Intercooled-Deleted pedestal-Stancor glow plug relay-1.0 housing-Isspro EV2's-Sky RSK-SD front and rear springs-Tru cool tranny cooler-Built Tranny-CCV mod-6 position chip running TW tunes-6637-3" down pipe to 4" straight pipe-Grab handle mod-Dual lighted visors-3.73 Gears-Warn hubs-SD aluminum rear diff cover-Dual front shocks-295/75/16 Toyo Open Country AT2's
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post #4 of 10 Old 07-22-2014, 09:30 AM
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Quote:
Originally Posted by Phillipjon View Post
Check a 10 or 5 amp fuse under the hood. I just can't remember the spot or the amp that it is.

if the fuse was blown it wouldnt work at all?

Local Jackass member Pat

Battle cry of every 6.0 owner out there
Quote:
Originally Posted by access_max View Post
With the issues fixed a 6.0 can run circles around a 7.3.
2000 F-350 7.3L ZF6
Standard 7.3 mods
SCT tuned
8" Fabtech lift 13" total
5:13 Gears
46" Goodyear MVTs Military takeoffs
Bushwacker Cut-Out Fender Flares
Ranch Hand front and rear bumper
On-board air W/Semi horns

1995 F-350 7.3L E4OD DRW
Standard 7.3 mods
PHP Hydra W/Tony Wildman tunes
160/0 Injectors
T-500 HPOP
E-fuel Conversion
West Coast mirrors
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post #5 of 10 Old 07-22-2014, 09:33 AM
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One would think, but it happened to me.

1996 F350 4X4 CCLB SRW
Full Force Stage 1.5-Swamps IDM-Efuel-Bosch 17* HPOP-Melling LPOP-Intercooled-Deleted pedestal-Stancor glow plug relay-1.0 housing-Isspro EV2's-Sky RSK-SD front and rear springs-Tru cool tranny cooler-Built Tranny-CCV mod-6 position chip running TW tunes-6637-3" down pipe to 4" straight pipe-Grab handle mod-Dual lighted visors-3.73 Gears-Warn hubs-SD aluminum rear diff cover-Dual front shocks-295/75/16 Toyo Open Country AT2's
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post #6 of 10 Old 07-22-2014, 11:11 AM Thread Starter
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Ok ill check those tonight



1997 f350 4x4 off road.
353k miles
Stage 1 swamp injectors. TS chip. Leveled on 35" Federal tires and black 18 inch pro comp wheels
3" downpipe into 5" straight pipe 6" tip. (Diamond eye)

1987 Chevy 1ton lifted 24 inches on 53s. Duece and a half transfer case. Mud truck.
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post #7 of 10 Old 07-22-2014, 11:35 AM
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Did you replace the tensioner itself, or just the pulley?

Check the connection of the quick-disconnect at the top of the alternator.
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post #8 of 10 Old 07-22-2014, 11:54 AM
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Have you put a volt meter on it? what does it show? How much is your alt putting out and how much is your batteries reading when running and off? If no drain I wouldn't sweat it.
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post #9 of 10 Old 07-25-2014, 10:25 AM
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Something quick and cheap is clean off all the grounding points in the engine bay. It might fix the problem and it might not but with your truck being that old cleaning the grounds isn't going to hurt. It's where I like to start with any electrical issues.

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post #10 of 10 Old 08-03-2014, 07:44 PM Thread Starter
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replaced the other idler pulley and put a new belt on it. problem has went away...



1997 f350 4x4 off road.
353k miles
Stage 1 swamp injectors. TS chip. Leveled on 35" Federal tires and black 18 inch pro comp wheels
3" downpipe into 5" straight pipe 6" tip. (Diamond eye)

1987 Chevy 1ton lifted 24 inches on 53s. Duece and a half transfer case. Mud truck.
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