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06-19-2011, 09:50 AM
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#1 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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73 gmc alt wiring
I have this new wiring for my alternator plug. One wire is red and the other is white and stamped exitor, where does this wire go. thanks in advance for any help.
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06-19-2011, 01:47 PM
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#2 |
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The One And Only !!!
Join Date: Jan 2007
Location: Hole in the woods Florida
Posts: 4,567
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Re: 73 gmc alt wiring
I assume this is what you mean ?
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93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz !  The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. "Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
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06-19-2011, 02:19 PM
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#3 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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Re: 73 gmc alt wiring
Yes, but where does the exitor go. thanks
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06-19-2011, 02:29 PM
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#4 |
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The One And Only !!!
Join Date: Jan 2007
Location: Hole in the woods Florida
Posts: 4,567
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Re: 73 gmc alt wiring
Any switched power source, In other words a wire that has power with the key in run position but no power with the key off.
__________________
93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. "Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
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06-19-2011, 04:13 PM
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#5 |
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Registered User
Join Date: Feb 2008
Location: Surprise, Ariz.
Posts: 186
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Re: 73 gmc alt wiring
thanks restrorob.
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06-19-2011, 04:27 PM
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#6 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: 73 gmc alt wiring
Quote:
The exciter wire normally goes to the GEN or ALT lamp on the dash. The idiot lamp bulb drops the voltage to @8vdc at the alternator plug. When the alternator goes bad and stops regulating the battery voltage to 13.4 volts, the exciter terminal will be much less than the battery voltage. The difference in voltage makes the lamp illuminate. The idiot light bulb is @ 470 Ohms in resistance. The gauge equipped trucks have a resistance wire tied to the fuse panel. If you are tying the field exciter straight to an ignition switched 12v source you need to insert @ 470-500 ohms of resistance inline to make up for the missing bulb. I would use a 1/2 watt 500 ohm resistor and put it where it won't burn the truck down if it gets hot. |
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