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Charging system issue
#1
OK, I replaced the alternator harness with an NOS that I got a great deal on from Jeff73Mach1. It's beautiful. Smile

But I must have forgotten something. I've started the car probably 10 - 15 times since replacing the harness, and last weekend it turned over kind of sluggish. At WalMart, it barely turned over once and wouldn't start. Got a jump from kind stranger and she fired right up. Drove home and wouldn't turn over.

I'll post up pics when I get home, but does the round steel tab near the alternator end of the harness need to be bolted to a ground or something? It's just hanging free in the air. I've got 12.07 volts at the battery right now, and haven't tested anything yet. Where to start?

New alternator, battery, etc. no squeals, everything new except voltage regulator.

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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#2
There's a stud toward the 'bottom' of the backside of the alternator (as installed). The 'tab' thing bolts onto that stud, then the fat wire with the eyelet goes to the 'BAT' terminal, and the other goes to the 'FLD' terminal. (I had mine attached to the 'STAT' terminal, and no chargey - and I have no idea what the colors are).

Sorry for the over-use of technical verbiage. rofl

Eric

[Image: mach1sig2.gif]
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#3
Mister 4x4;128222 Wrote:There's a stud toward the 'bottom' of the backside of the alternator (as installed). The 'tab' thing bolts onto that stud, then the fat wire with the eyelet goes to the 'BAT' terminal, and the other goes to the 'FLD' terminal. (I had mine attached to the 'STAT' terminal, and no chargey - and I have no idea what the colors are).

Sorry for the over-use of technical verbiage. rofl

LOL Eric. OK, I'll attach that tab to a stud on the back of the alternator. The fat wire is attached to the BAT with a nut, and then I have two skinny wires attached to FLD and STAT terminals with their press-in connector thingies.

Any testing I can do to determine if it works besides wait and hope that the battery charges?

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
#4
I believe Painless has most Fords on their site...alt connections for almost all Ford V8 vehicles from the 70's will be the same: mustangs, torinos, cougars, pickups, vans....all basically the same. Painless wiring has color diagrams and details if you want to see them on the internet. And there are tons of reference manuals available if you want to keep one in the garage and get greasy prints all over it, which is also funny to keep.
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#5
Round steel tab? Is this on your negative battery cable? The negative battery cable should go from the (-) terminal, the metal tab should then be secured to the chassis under the voltage regulator, and then the end of the cable should be bolted to the engine.

2013 Ford Focus SE Flex Fuel 5spd - Daily Driver
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#6
Here's a couple pics:


.jpg   Alternator wiring 1.JPG (Size: 37.75 KB / Downloads: 87)

You can see the orange-capped wire but not the black-capped one down below. And you can't see the silver tab at the intersection of all the wires near the alternator.


.jpg   Alternator wiring 2.JPG (Size: 32.26 KB / Downloads: 86)

Also, there are four male spades coming out of the VR, but only three female connectors in the VR plug. The fourth spot is a blank:


.jpg   Voltage regulator 1.JPG (Size: 30.33 KB / Downloads: 85)



.jpg   Voltage regulator 2.JPG (Size: 41.22 KB / Downloads: 82)

More ideas?

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
#7
btw the rubber thing with the tab is called the "strain relief" by Ford. It absorbs the rocking motion of the awsome American V8 when you pump the throttle and make the engine shake under the hood! Fun hobby right?
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#8
wwhite72;128242 Wrote:btw the rubber thing with the tab is called the "strain relief" by Ford. It absorbs the rocking motion of the awsome American V8 when you pump the throttle and make the engine shake under the hood! Fun hobby right?

OK, thanks for the info. Sounds like it doesn't serve any purpose related to charging the battery, but I'll strap her down anyway.

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
#9
I think it might serve a grounding purpose as well, but im not sure.
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#10
OK, update. Getting 12.18 volts at the battery terminals with the car running.

I forgot to hook this wire up, so that may be the culprit. Where does it connect to the solenoid area?


.jpg   DSCN1934_636 (Small).JPG (Size: 43.69 KB / Downloads: 69)



.jpg   DSCN1935_637 (Small).JPG (Size: 34.47 KB / Downloads: 65)

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
  Reply
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