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post #1 of 12 (permalink) Old 02-01-2011, 07:48 PM Thread Starter
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No start

The 5.0 died on me today and after being convinced was the battery I got it jumped and the Alternator light came on.
The alternator can cause the car not to start?
Got it home with the gauge sitting on M an having to keep it at 3k to keep the light off. Was only dimly lit when on though. Battery checked out good twice.

If all else fails get a bigger hammer!

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post #2 of 12 (permalink) Old 02-01-2011, 08:01 PM
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What's the alternator voltage at idle? Could be a bad voltage regulator.

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post #3 of 12 (permalink) Old 02-01-2011, 09:04 PM Thread Starter
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Figuring bad regulator, as far as idle I was more concerned about getting it home than anything else.

If all else fails get a bigger hammer!

93 SC Tbird
MPII w/ Plenum,90mm MAF, 85mm TB, 40# Injectors, 255 lph FP, Double IC w/fan, SCT Chip (Tuned by Jerry),3/4" Raised Top, F52-TT TC, SilverFox AOD 550, SPT-R VB
96 1/2 XR7 Sold and Salvaged
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post #4 of 12 (permalink) Old 02-02-2011, 08:20 AM
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by "no start" do you mean cranks strong and does not fire, or doesnt crank at all? Also what was the voltage at the battery?

John
1996 TBird LX 4.6
2001 Sable Wagon 3.0 Duratec
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post #5 of 12 (permalink) Old 02-02-2011, 05:16 PM Thread Starter
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12.7 volts at battery and 675 CCA by no start I mean the whole car goes dead, as if was no battery at all.

If all else fails get a bigger hammer!

93 SC Tbird
MPII w/ Plenum,90mm MAF, 85mm TB, 40# Injectors, 255 lph FP, Double IC w/fan, SCT Chip (Tuned by Jerry),3/4" Raised Top, F52-TT TC, SilverFox AOD 550, SPT-R VB
96 1/2 XR7 Sold and Salvaged
93 5.0 Tbird
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post #6 of 12 (permalink) Old 02-02-2011, 06:19 PM
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You should have the battery load tested to eliminate it..One other thing is, I had the same problem before..
Car just died on me in the middle of traffic..Ended up being this plug I have circled in the pic..
I just wedged a small peice of wood between the plug and Alternator casing until I could get home and fix it properly..
Hope that helps..Good Luck!
Attached Images
File Type: jpg Alternator Wiring Harness Stator.jpg (15.3 KB, 1 views)

.
.
1991 Ford Thunderbird Sport

"If you don't know where you're going..Any road will take you there." George Harrison

Last edited by Rayo; 07-01-2017 at 04:56 AM. Reason: update pic..
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post #7 of 12 (permalink) Old 02-02-2011, 06:42 PM
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First thing I would do is take the terminals off, clean them VERY well and tighten them up. My work van didnt start yesterday and acted the same way. pleanty of power, just nothing going past the battery. Turns out that over a year ago a new battery was put in and the genious who put it in didnt tighten down the terminals.

John
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post #8 of 12 (permalink) Old 02-04-2011, 12:49 PM Thread Starter
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Is not alternator related...

Have it traced to either the positive cable or the fender relay. Most likely replacing both.

If all else fails get a bigger hammer!

93 SC Tbird
MPII w/ Plenum,90mm MAF, 85mm TB, 40# Injectors, 255 lph FP, Double IC w/fan, SCT Chip (Tuned by Jerry),3/4" Raised Top, F52-TT TC, SilverFox AOD 550, SPT-R VB
96 1/2 XR7 Sold and Salvaged
93 5.0 Tbird
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post #9 of 12 (permalink) Old 02-04-2011, 06:11 PM Thread Starter
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Appears to have been the positive cable initial testing is good with the new cable. Started the car with no belt or alternator which is more than it was doing tomorrow will put every thing back together and hope for the best.

Odd thing is the old cable Ohms out good but guess it fails under load.

If all else fails get a bigger hammer!

93 SC Tbird
MPII w/ Plenum,90mm MAF, 85mm TB, 40# Injectors, 255 lph FP, Double IC w/fan, SCT Chip (Tuned by Jerry),3/4" Raised Top, F52-TT TC, SilverFox AOD 550, SPT-R VB
96 1/2 XR7 Sold and Salvaged
93 5.0 Tbird
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post #10 of 12 (permalink) Old 02-04-2011, 07:48 PM
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If only a few strands of wire are carrying current, the effective max. current load drops immensely.

-Brandon
97 Laser Red Thunderbird LX 162k, Stage 2 4.6L 2v N/A | 300 BHP (255 RWHP, 290 RWTQ) | 13.95 @ 97.58 | Build details | Pics at the Lorain Assembly plant
98 Black Mark VIII 160k, stock daily driver
07 Redfire Fusion V6 SEL 178k, for the wife
Gone but not forgotten: 96 Mark VIII, 94 Cougar XR7, 93 Mark VIII

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Once you have tasted flight, you will walk the world with your eyes turned skyward, for there you have been and there you long to return. -Leonardo da Vinci
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post #11 of 12 (permalink) Old 02-04-2011, 09:56 PM
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Quote:
Originally Posted by bowez View Post
Appears to have been the positive cable initial testing is good with the new cable. Started the car with no belt or alternator which is more than it was doing tomorrow will put every thing back together and hope for the best.

Odd thing is the old cable Ohms out good but guess it fails under load.
Dunno about you, but only one of my multimeters can measure that cable properly (all the others show 0 ohms ... but they DO go to 400.0 V DC ... )

RwP
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post #12 of 12 (permalink) Old 02-05-2011, 09:26 AM Thread Starter
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I only check continuity, don't have the equipment to do anything more complicated, and for $9 for the cable no need to.

Put everything back on and she fired right up even ran a full electrical load at idle and all was fine.

Anyone need a 18yr old cable?

If all else fails get a bigger hammer!

93 SC Tbird
MPII w/ Plenum,90mm MAF, 85mm TB, 40# Injectors, 255 lph FP, Double IC w/fan, SCT Chip (Tuned by Jerry),3/4" Raised Top, F52-TT TC, SilverFox AOD 550, SPT-R VB
96 1/2 XR7 Sold and Salvaged
93 5.0 Tbird
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