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Author Topic:   Diagnosing Electrical Problems
JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-10-2001 12:48 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
I have gotten most of the bugs worked out and almost have my 65 ready to go but I still have an issue with the battery not charging. It is a fairly new battery but I will be replacing it with an Optima Yellow soon. What is the best way to figure out where the problem is coming from?

I was going to remove the alternator and have it checked out but I was thinking that it could also be the regulator or maybe a short somewhere. Could it also be that the power requiremnt is greater than the output? Maybe I could have the alternator shop upgrade it.

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JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-10-2001 02:56 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
Let me bring it to the top and ask one more question as well. How do you know if a problem is from the Voltage Regulator or Alternator? Different symptoms?

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The Iceman
Gearhead

Posts: 2116
From: Shelton, CT
Registered: Jul 2000

posted 09-10-2001 03:01 PM     Click Here to See the Profile for The Iceman   Click Here to Email The Iceman     Edit/Delete Message   Reply w/Quote
check the manual, I know my shop manual has the various tests/symptoms of bad voltage regulators etc.
Check the alternator, it cant hurt!
If you have the stock 45amp alternator, you could always go for the 100amp version they now make
Best of luck with your '65, mine is almost done too (oddly enough, its just electrical probs, two in particular, that are holding me back from registering her )
have a good one

------------------
Dan~
1965 Coupe "BeeBop" 200ci Straight "6"~2.77 3-spd w/Hurst Shifter~Pertronix Elec. Ign.~Flamethrower Coil~Flex-Fan~Clifford 6-2 Header~26" Smithys~3" chrome tips~'85 T-Bird TC buckets~'66 guages
https://mustangsandmore.com//ubb/TheIceman.html
http://www.motorcities.com/contents/01GF9250033520.html
Nothing Beats Six In A Classic Mustang! ;)

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JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-10-2001 04:24 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
Thanks, I've already gotten her back out on the road. The 347 looks like it is going to be pretty wild. The problem is I'm draining the battery. I had to have my wife come and give me a jump down at the gas station on Saturday. I hate when that happens!

Brings me to something funny I did when I was a bit younger but considering again. I had two batteries mounted in my trunk, one over each wheel with a switch that controlled which battery was active. There had just been a few too many instances where the battery died. This way I could turn the batteries off when parked and run on just one. I always had one fully charged one just in case something happened. Never got stuck again.... at least not for the lack of power.


quote:
Originally posted by The Iceman:
check the manual, I know my shop manual has the various tests/symptoms of bad voltage regulators etc.
Check the alternator, it cant hurt!
If you have the stock 45amp alternator, you could always go for the 100amp version they now make
Best of luck with your '65, mine is almost done too (oddly enough, its just electrical probs, two in particular, that are holding me back from registering her )
have a good one


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AKBOSSMAN
Gearhead

Posts: 2912
From: WASILLA , AK USA M&M #743 MCA #40857
Registered: Oct 2000

posted 09-10-2001 04:37 PM     Click Here to See the Profile for AKBOSSMAN   Click Here to Email AKBOSSMAN     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by JAAZZY:
.....I had two batteries mounted in my trunk, one over each wheel with a switch that controlled which battery was active. .............

I had one in the trunk of my escort and carried long jumper cables, worked for me


------------------
WAYNE CURTIS
70 GRABBER GREEN BOSS 302
01 Focus ZX3
03 Boss 281 (waiting on order form)
92 SHELBY 4X4 (K-9 IDITAROD LEAD DOG)
www.iditarodtrail.com
"If your under control then your not going fast enough" Parnelli Jones

[This message has been edited by AKBOSSMAN (edited 09-10-2001).]

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JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-10-2001 04:49 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote

Well I just called a few alternator shops in the area to ask if they can rebuild my 60amp chrome alternator into a 100amp unit. The price quoted was $100-$165! I think I'll just get a new one from JEGS!

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Boss Hoss
Gearhead

Posts: 223
From: Georgia
Registered: Mar 2001

posted 09-10-2001 10:33 PM     Click Here to See the Profile for Boss Hoss   Click Here to Email Boss Hoss     Edit/Delete Message   Reply w/Quote
Jaazzy:
I had the exact same problem recently with my '65. It turned out that I was an IDIOT and had connected the alternator wiring harness to the starter terminal of the solenoid instead of the battery terminal of the solenoid where it belongs. I also had a problem with the "ALT" light coming on even though I definitely had a good alternator. It turned out that I needed a new voltage regulator...now I have no charging problems! (knocking on wood)

P.S.: It also didn't hurt that I completely re-wired the engine bay and under the dash! Got to have that juice flowing through good wires!

------------------
*andy* ([email protected])

also known as...***Boss Hoss***

*1965 Mustang 289 coupe*
*1996 Mustang GT coupe*

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JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-11-2001 01:10 AM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
Boss,

I haven't double checked yet but I believe the wiring is correct. I actually didn't put it in this time. A reputable Mustang shop in the area did when they put in my new motor. The reality is though that I am running two electric fans and fuel injection. The fans say that they pull 7.5 amps so I would guess that is optimal and give it at least 10 amps so without anything else we are already at 20amps. I would say at least 10 amps to power the injection with the electric fuel pump. So 30 amps without taking into account any other devices in the car and any other losses. I figure that the 65amp I have now probably doesn't produce that much at idle so a 100amp seems the minimum. I was also planning to double check the wiring and install a new regulator at the same time. I went ahead and ordered the Chrome 100amp from Jegs. Thanks for the input.

quote:
Originally posted by Boss Hoss:
Jaazzy:
I had the exact same problem recently with my '65. It turned out that I was an IDIOT and had connected the alternator wiring harness to the starter terminal of the solenoid instead of the battery terminal of the solenoid where it belongs. I also had a problem with the "ALT" light coming on even though I definitely had a good alternator. It turned out that I needed a new voltage regulator...now I have no charging problems! (knocking on wood)

P.S.: It also didn't hurt that I completely re-wired the engine bay and under the dash! Got to have that juice flowing through good wires!


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mellowyellow
Gearhead

Posts: 6677
From: So. Fl.
Registered: Aug 2000

posted 09-11-2001 07:39 AM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
Jaazzy: Is the new alternator a one wire alternator or the Ford regulator kind. Are you running v-belts or serpentine? Asking this because am going with EFI and plan on keeping the v-belt set up and using a 100 amp alt. As I'm not going for all out performance, am running basic 92 EFI with AOD, or maybe, just keeping the c-4. The more I investigat, the more I like keeping the c-4.

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JAAZZY
Gearhead

Posts: 776
From: Bay Area, CA
Registered: Apr 2001

posted 09-11-2001 09:54 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
I had a choice of either type but since I already have the wires pretty well hidden I decided to go with the external regulator. I will probably put in a new one of those as well.

I also have the stock V belt. I am using the Holley injection though not the late model EFI. The Projection 4bbl has always worked well for me.

I like the idea of overdrive. That was one of the things that I had a problem with when I had a C4. I was reading in MF that Lentech has a AOD that they claim can take 1200hp. Sounds pretty good but I bet expensive.

quote:
Originally posted by mellowyellow:
Jaazzy: Is the new alternator a one wire alternator or the Ford regulator kind. Are you running v-belts or serpentine? Asking this because am going with EFI and plan on keeping the v-belt set up and using a 100 amp alt. As I'm not going for all out performance, am running basic 92 EFI with AOD, or maybe, just keeping the c-4. The more I investigat, the more I like keeping the c-4.

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mellowyellow
Gearhead

Posts: 6677
From: So. Fl.
Registered: Aug 2000

posted 09-11-2001 10:35 PM     Click Here to See the Profile for mellowyellow     Edit/Delete Message   Reply w/Quote
Is the Lentech expensive??? Try 2995 for an "entry level" LOL! Lentech! Too rich for this ol' boy! Lentech-Schmentech!! LOL!

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