Need More Help with Alternator
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Need More Help with Alternator
OK! There's is a big yellow wire with a white stripe, (looks like maybe a 10 gauge wire), coming off the back of the alt. The wiring harness that plugs into the alt. has three wires on it, a white wire with a black stripe on that plugs back into the alt., then there's a orange wire with a light blue stripe on it, and there's a light green wire with a red stripe on it. The diagram for the internal reg. shows two orange wires with black stripes and this one has only one with a light blue stripe. Would the big yellow wire and the orange wire go to the starter selenoid and the green wire splices into the wire for the gauge?ctvanover
Lead Driver
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From: Albuquerque
Mr. Amp Alternator
GREAT diagram subford! However, does anyone know if the '76 F-Series (F150 4x4) is the same as the '78 diagram above?
I will be doing an alternator upgrade (Mr. Amp...130amp Alternator) this weekend...and this info would be helpful.
Thanks!
biz
I will be doing an alternator upgrade (Mr. Amp...130amp Alternator) this weekend...and this info would be helpful.
Thanks!
biz
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by biz4two
GREAT diagram subford! However, does anyone know if the '76 F-Series (F150 4x4) is the same as the '78 diagram above?
I will be doing an alternator upgrade (Mr. Amp...130amp Alternator) this weekend...and this info would be helpful.
Thanks!
biz
I will be doing an alternator upgrade (Mr. Amp...130amp Alternator) this weekend...and this info would be helpful.
Thanks!
biz
NOTE: HOWEVER I DO NOT KNOW WHAT VALUE THE RESISTOR SHOULD BE.
I was hoping that maybe Franklin2 would come in and answer that question for us.
Last edited by subford; Oct 5, 2005 at 02:49 PM.
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From: Virginia
In the older trucks the resistor was 500 ohms. I am thinking it may be there in case the bulb blows out, the system would still charge, but I am not sure.
I am getting a little confused here myself. The diagram you made is a conversion diagram, to mate the old wiring with the newer alt correct? I didn't think they made an internal regulated alt back in the 70's? Just verifying what I think I am seeing.
Note however the lower wire colors were for a late model alternator.
Fleet Owner
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From: Easton,Ks
Originally Posted by Franklin2
I am getting a little confused here myself. The diagram you made is a conversion diagram, to mate the old wiring with the newer alt correct?
Originally Posted by Franklin2
I didn't think they made an internal regulated alt back in the 70's? Just verifying what I think I am seeing.
The top wire colors are from the 1970's
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I'm really confused now because the truck I'm working on is an '85. Anyway, I put the alt. on today and everthing seems to be working ok but I have noticed that Instr. panel lights are dimmer than what they were and I beleive the headlights are too! What have I done wrong?
Chris
Chris
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From: Virginia
The external regulated alt system is basically the same for all those years, so that will work ok.
With it all installed now, with the engine running, take a voltmeter reading on the battery and report back.
With it all installed now, with the engine running, take a voltmeter reading on the battery and report back.
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Fleet Owner
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From: Easton,Ks
Sorry, now that I have gotten confused.
Well there were three people asking questions about this in the same threads.
The above diagram is for biz4two and Brian794x4.
In another thread ctvanover did say 1985 F-150.
Do you have a light or gauge?
The Alternator is from a 1995, right?
I wish people would start their own threads.
Well there were three people asking questions about this in the same threads.
The above diagram is for biz4two and Brian794x4.
In another thread ctvanover did say 1985 F-150.
Do you have a light or gauge?
The Alternator is from a 1995, right?
I wish people would start their own threads.
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Yep! The alt. is from a 95 but it seems to charging ok. What about the wires that went into the external reg. and the ones coming out of it... would they have something to do with dim instr. panel and maybe the headlights?
Chris
Chris
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From: Easton,Ks
Originally Posted by ctvanover
Yep! The alt. is from a 95 but it seems to charging ok. What about the wires that went into the external reg. and the ones coming out of it... would they have something to do with dim instr. panel and maybe the headlights?
Chris
Chris
If not ask back.
Bill
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From: Easton,Ks
The diagram below is the way your old system was.
The ORN/Lt BLU wire is not used anymore.
The RED/GRN wire now goes to to the "S" (95 W/BK) term. of the three wire Alternator plug.
The YEL/WHT wire now goes to the "I" (95 LG/R) term. of the three wire Alternator plug.
The BIG BLK/ORN BAT. wire now goes to the "B+" term of the Alternator and if you also have a big yellow wire it would go on the B+ term. also. I think it goes to the Ign. Sw.
The WHT/BLK wire, I am not sure where it comes from but it would go on the single "S" plug of the 95 Alt.
And of course this is all wrong if you have a light and not a gauge.
The ORN/Lt BLU wire is not used anymore.
The RED/GRN wire now goes to to the "S" (95 W/BK) term. of the three wire Alternator plug.
The YEL/WHT wire now goes to the "I" (95 LG/R) term. of the three wire Alternator plug.
The BIG BLK/ORN BAT. wire now goes to the "B+" term of the Alternator and if you also have a big yellow wire it would go on the B+ term. also. I think it goes to the Ign. Sw.
The WHT/BLK wire, I am not sure where it comes from but it would go on the single "S" plug of the 95 Alt.
And of course this is all wrong if you have a light and not a gauge.