putting a TPI in an old chevy truck using the serpintine system and accys
I need to know where to run the wires from the pigtail on top of the alternator (red, black and brown). I will be running a volt meter as a gauge not an amp meter.
Thanks

 

 

Thanks for the info,that looks easy enough,
do I still need to use the brown wire if I am not using a warning lamp? I will be running a autometer volt gauge

 

no you can just attach the sense and the output post

 

unless Alt has been rewired as a 1 wire " self exciting " unit
you need the L terminal connected to a resistor or lamp ( which acts as a resistance) to supply the signal to excite the Alt
See
http://www.alternatorparts.com/cs130_sbpage2.htm
http://www.alternatorparts.com/cs130_sbpage3.htm

 

Good information but the only thing not mentioned is what kind of resistor do I need to use? Someone mentioned a 5 watt but what is the resistance value?
does anyone have a source or a part number for the reisitor?

 

 

looks like gm recommends 50 ohms inline if you install it in the engine compartment solder it in and use shrink tubing over it.

 

Thanks for the help guys! That answers my questions