89 Mustang w prem sound yellow power wire not constant

HemiRick

I'd be looking at jacking under the house
Jun 28, 2020
764
288
73
58
Memphis TN
It should be according to the diagrams I've found....I cant find a wiring digram of where this power comes from....my yellow wire is not constant.
 
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General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
20,713
7,122
203
polk county florida
Yellow/ black stripe is switched power, hot in accessory and run. Comes from fuse box, 15 amp.
The only yellow wire (no stripe) is LH rear amp imput return. Is this the premium sound system?
 

Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
36,929
12,797
224
Massachusetts
The wiring diagram is strange.

here’s the non-premium radio. Fuse 11 is hot at all times. I think this is an error as fuse 8 powers things that do get constant power.
980AEAF4-085E-4409-B58B-583E54E10196.jpeg



Here’s the premium radio. Fuse 11 is switched. Fuse 8 is now hot all the time. I think this is right based on looking at the power distribution diagram. In tjing case, the light gray is your constant
347AC775-6100-4815-9720-8EE38F2FB5B6.jpeg