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Author
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Topic: No charge?
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Hell_Fish
Gearhead Posts: 637
From: Austin, TX.
Registered: May 2002
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posted 02-20-2003 11:26 AM
   
On the way to work today the 69 died. Something drained the battery. I took the old old in and bought a new one(needed one for my 56 F-100 anyways). Put it in and if fired right up. I noticed that the alt gauge show a small discharge. The old battery was charged and holds it fine. The alt. is about 3 months old. A few things are going though my head as to what is wrong. I'm wondering if I got the wrong alt at AutoZone(rm302boss thought the fan blades looked backwards) and got a reverse alt. or something is shorting. Anyone have an idea? I'm going to take it to AutoZone at lunch to have them plug it up. The bad part is, its rain like hell today and its cool to boot. The Stang would have to pick today to have problems.------------------
Dustin C
"The Mopar Guy!"
56 F-100
Mech. for wifes 69 Mustang coupe
65 Plymouth Barracuda
70 Dodge Swinger
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Jeff
Gearhead Posts: 253
From: Moore, OK USA
Registered: Mar 2001
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posted 02-20-2003 11:42 AM
Bad diode(s) in alternator can cause battery drain. Usually they will burn up and go open but they can simply have high leakage current and simply drain battery. If only one diode is bad, the result can be what you have experienced. Note the alternator can still appear to work under these conditions but will not pass a full load test. The stator will have a voltage on it from unbalanced current in the output. Autozone's tester should diagnose these faults.
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 02-20-2003 02:54 PM
Have the next one bench tested before you leave the store.
If it's good, then look at your alternator harness for the fuseable link. You may have toasted it.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Hell_Fish
Gearhead Posts: 637
From: Austin, TX.
Registered: May 2002
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posted 02-20-2003 03:16 PM
Well, I didn't make it to AutoZone at lunch. The rain was coming down to hard for me to pull parts in a parking lot. Yup, I wussed out. Thanks guys. I will keep this stuff in mind when I do get it checked.------------------
Dustin C
"The Mopar Guy!"
56 F-100
Mech. for wifes 69 Mustang coupe
65 Plymouth Barracuda
70 Dodge Swinger
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rm302 boss
Moderator Posts: 578
From: Austin Texas
Registered: Dec 2002
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posted 02-20-2003 06:44 PM
[QUOTE]Originally posted by Hell_Fish:
[B]Well, I didn't make it to AutoZone at lunch. The rain was coming down to hard for me to pull parts in a parking lot. Yup, I wussed out. Thanks guys. I will keep this stuff in mind when I do get it checked.Voltage regulator? did you replace it with the alt? That would be my first guess.
New alt, new batt yep, i would go to the voltage regulator.
Rene ------------------
1970 Boss 302
1990 Taurus SHO
1985 Mustang GT 351W
1995 Land rover Disco
1980 Triumph Spitfire (auto-X car)
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Kyle
Gearhead Posts: 235
From: Sumner, WA
Registered: Dec 2001
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posted 02-20-2003 07:11 PM
I had a similar problem with my '66- it woldn't charge. I replaced the alternator and regulator, but no help. It turned out that the ground wire from the block to chassis was corroded. Wire brushed it and the grounding points, and it charged perfectly. Make sure all your connections are to bare metal, and wire brush any that look suspect.
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Hell_Fish
Gearhead Posts: 637
From: Austin, TX.
Registered: May 2002
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posted 02-20-2003 11:13 PM
Rene and I found the problem. The alt fried, part of my harness too. The fueable link is good. I will be taking the POS back to the zone for a new one. I swiped the one of my 56 so I can get to work tomorrow.Thanks guys,
Big thanks to you Rene. ------------------
Dustin C
"The Mopar Guy!"
56 F-100
Mech. for wifes 69 Mustang coupe
65 Plymouth Barracuda
70 Dodge Swinger
IP: Logged |
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