68 Mustang Electrical Connection - Vintage Mustang Forums
 
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post #1 of 4 (permalink) Old 04-30-2015, 05:34 PM Thread Starter
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68 Mustang Electrical Connection

Hoping someone can help me out on this one. I've been searching the forums and looking at schematics but can't figure out what this red connector is for in the picture. It looks similar to the yellow accessory plug. I think it might be something for extra gauges. Anyone know? Should something be plugged into it now?
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post #2 of 4 (permalink) Old 04-30-2015, 05:59 PM
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That red connector with 3 female bullet connector ports is on circuit 19 (LBLU/RED) and is for the dimmable illumination lights that are on when the headlight switch is pulled out at least one click and dimmed by rotating the headlight switch knob/shaft.

This circuit starts at the headlight switch's internal 15A circuit breaker and comes off the switch at the switch's 'I' terminal. It continues to the fuse box where it goes across the 2.5A 'INS ILL' fuse and continues to the red 3 port connector. From here is connects to a single female bullet connector for the radio illumination and then passes thru one of the multi pin connectors that go to the instrument cluster to feed the cluster illumination lights. Typically the red connector would only be used for RPO/DPO accessories in the interior which required dimmable illumination when the headlights were on.

That red 3 port connector is shown in this diagram (upper left corner just below and to the right of the 'A' in the circle):
http://averagejoerestoration.com/wp-...adio-audio.jpg

Paul

Okay. Engine Stop. ACA out of Detent. Mode Control, both Auto. Descent Engine Command Override, Off. Engine Arm, Off. 413 is in.
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post #3 of 4 (permalink) Old 05-01-2015, 08:10 AM Thread Starter
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Thanks for the detailed info! I must have overlooked that diagram on the average joe site. So based on what you are saying I doesn't sound like I would want to use this to power the radio I'm installing. From what I gather it would only work if the headlights are on. Correct?
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post #4 of 4 (permalink) Old 05-01-2015, 08:42 AM
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Quote:
Originally Posted by AADaddy View Post
Thanks for the detailed info! I must have overlooked that diagram on the average joe site. So based on what you are saying I doesn't sound like I would want to use this to power the radio I'm installing. From what I gather it would only work if the headlights are on. Correct?
Ford should have put this on the 'interior illumination' schematic.

^^Yes that is correct. But you can use this circuit to power the radio's internal illumination light if it has one.

Good luck
Paul

Okay. Engine Stop. ACA out of Detent. Mode Control, both Auto. Descent Engine Command Override, Off. Engine Arm, Off. 413 is in.
-Buzz Aldrin, Apollo 11 LMP
Actual first words from the surface of the moon

Early Fox: 5.0L HO SEFI conversion, 5-speed, 8.8 w/3.27:1 TL, full dual exhaust

1968 coupe - Ordered 12.15.67 Delivered 2.1.68: 8T01T, 65C, 289 conversion, hanger queen
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