T wiring

E

Ed H

Junior Member
Starting to rewire the 27 and have harneses from langs. What guage should the wire be? the origonal wire not the insulation is 12+ on most of the wiring. Thanks Ed
 
Copied from other site: The heavy yellow wire goes from the battery side of the starter switch up to terminal #3 of the barrier terminal block on the firewall. Terminal #3 is the third one from the left as you face the block. From there ANOTHER HEAVY YELLOW wire goes to the Drivers side terminal of the ammeter. A heavy YELLOW/BLACK wire then goes from the passenger side terminal of the ammeter over to the BAT terminal on the ignition/light switch. Then another heavy YELLOW/BLACK wire goes from that BAT terminal to terminal #1 (leftmost) on the barrier terminal block. Finally a heavy YELLOW/BLACK wire goes from terminal #1 of the barrier block to the cutout output screw terminal. For your info many of the repro looms have the wrong gauge wire for ALL or part of the YELLOW/BLACK wire runs of which there are 3. ALL 5 wires I have just described are supposed to be 12 Gauge wires but on many repro looms only the SOLID YELLOW wires are 12 Gauge while the YELLOW/BLACK wires are 14 Gauge. Compare the outside diameter of these 2 wires in your loom if you suspect you might have the wrong wires in yours. The solid yellow wires seem to all be correct 12 Gauge. There is a noticeable difference between the O.D. of these 2 different gauge wires. This can cause your headlights to be a bit dimmer than normal and also your voltage regulator won't work as well if you have one. Replace the 14 gauge wires with 12 Gauge and your regulation to your battery will improve and your lights will be a bit brighter at night too.
 
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