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Stereo power is dead, fuses are all fine

16053 Views 8 Replies 5 Participants Last post by  miesk5, 
ElJosho
So I had to remove a DVD/CD combo from my new '96 F-350 and being in a hurry I made some mistakes. The PO used the adapter for the ford plug so I cut all the wires at the connections between the adapter and the harness for the DVD player. I then forgot to unplug the adapter before stripping the wires and the hot hit the ground and popped. Now there's no power to it, and after checking every fuse and replacing the stereo/radio fuses it's still dead. Any ideas? I couldn't find anything like this while searching. Can't find any in-line fuses either. Thanks in advance. :banghead

Edit: Went and re-tested everything, the ignition wire is hot with key on, but the constant hot/memory is dead either way. Just so I'm clear: the bad wire comes from the ford harness as green/black stripe, goes into the adapter as a fat yellow, splices into stereo harness as fat yellow. The wire is dead in all three places.
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LeMieux
IM no expert on the later model years, but look for fusable links and breakers. Good luck
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N
just because the fuse blew on the stereo doesn't mean u did not fry your head unit...well u just read your edit...and the wire is not dead in three places....it has to be from the beginning to the first connection..be all your other wires will still show "no power"
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broncos_n_harleys
Do you have a fuse block under the hood?
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ElJosho
yeah I checked the fuse block, all good.

To clarify: there is no power to the constant power even without the head unit in. I have a brand new head unit I'm putting in and it definitely doesn't work without the constant power.
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miesk5
yo,
This is from 1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
Should be same for your 90

Electronic Stereo Radio
see da green/black stripe
and 2 Fuses
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miesk5
11
Power Distribution

============

AM Radio
============

Premium Sound AM/FM Compact Disc Radio
============

Pin Number Circuit Circuit Function
1 803 (BR/PK) Amplifier/Speaker Switch Ground to Right Rear Speaker
2 806 (PK/LB) Speaker Voice Coil Feed — Rear (Right Channel)
3 811 (DG/O) Speaker Switch Ground to Right Front Speaker
4 805 (W/LG) Speaker Voice Coil Feed — Front (Right Channel)
5 801 (T/Y) Amplifier/Speaker Switch Ground to Left Rear Speaker
6 807 (PK/LG) Speaker Voice Coil Feed — Rear (Left Channel)
7 813 (LB/W) Speaker Switch Ground to Left Front Speaker
8 804 (O/LG) Speaker Voice Coil Feed — Front (Left Channel)
Radio Connector C2, AM, AM/FM, AM/FM Cassette
==============

Pin Number Circuit Circuit Function
1 694 (BK/LG) Audio Ground
2 — Not Used
3 694 (BK/LG) Audio Ground
4 — Not Used
5 19 (LB/R) Instrument Panel Lamp Feed
6 137 (Y/BK) Ignition (Hot in ACCY or RUN)
7 57 (BK) Ground
8 797 (LG/P) Battery Feed to Stereo
Harness Connector to Jumper, Premium Sound AM/FM Compact Disc Radio
===============

Pin Number Circuit Circuit Function
1 694 (BK/LG) Audio Ground
2 — Not Used
3 694 (BK/LG) Audio Ground
4 — Not Used
5 19 (LB/R) Instrument Panel Lamp Feed
6 137 (Y/BK) Ignition (Hot in ACCY or RUN)
7 57 (BK) Ground
8 797 (LG/P) Battery Feed to Stereo
Radio Jumper Harness Connector, Premium Sound AM/FM Compact Disc Radio
=============

Pin Number Circuit Circuit Function
1 689 (DB) Logic Mute
2 — Not Used
3 694 (BK/LG) Audio Ground
4 — Not Used
5 19 (LB/R) Instrument Panel Lamp Feed
6 137 (Y/BK) Ignition (Hot in ACCY or RUN)
7 57 (BK) Ground
8 797 (LG/P) Battery Feed to Stereo
Radio Jumper Radio Connector C1, Premium Sound AM/FM Compact Disc Radio
=====================

Pin Number Circuit Circuit Function
1 855 (LB) RR AMP Input Return
2 278 (P/W) Rear Speaker (RH)
3 858 (BR) RF Input Return
4 279 (W/R) Right Front Speaker
5 859 (Y) LR AMP Input Return
6 277 (LB/BK) Rear Speaker (LH)
7 857 (W/O) LF AMP Input Return
8 280 (LG) Left Front Speaker

Radio Connector C2, AM, AM/FM, AM/FM Cassette
=================

Pin Number Circuit Circuit Function
1 803 (BR/PK) Right Rear Speaker Return (-)
2 806 (PK/LB) Right Rear Speaker Feed (+)
3 811 (DG/O) Right Front Speaker Return (-)
4 805 (W/LG) Right Front Speaker Feed (+)
5 801 (T/Y) Left Rear Speaker Return (-)
6 807 (PK/LG) Left Rear Speaker Feed (+)
7 813 (LB/W) Left Front Speaker Return (-)
8 804 (O/LG) Left Front Speaker Feed (+)
9 — Not Used
10 — Not Used
11 — Not Used
12 689 (DB) Logic Mute
13 694 (BK/LG) Audio Ground
14 797 (LG/P) Battery Feed to Amplifier

Premium Sound Amplifier Connector C1
========

Pin Number Circuit Circuit Function
1 857 (W/O) LF AMP Input Return
2 859 (Y) LR AMP Input Return
3 858 (BR) RF AMP Input Return
4 855 (LB) RR AMP Input Return
5 280 (LG) Left Front Speaker
6 277 (LB/BK) Rear Speaker (LH)
7 279 (W/R) Right Front Speaker
8 278 (P/W) Rear Speaker (RH)

Premium Sound Amplifier Connector C2
=========

Pin Number Circuit Circuit Function
1 694 (BK/LG) Audio Ground
2 — Not Used
3 694 (BK/LG) Audio Ground
4 484 (O/BK) Liquid Crystal Display
5 19 (LB/R) Instrument Panel Lamp Feed
6 137 (Y/BK) Ignition (Hot in ACCY or RUN)
7 57 (BK) Ground
8 797 (LG/P) Battery Feed to Stereo

Radio Connector C1, All Non-Premium Sound Radios
---------------------------------------------
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ElJosho
Wow! Thanks for the diagrams! Finally got back from vacation (wife made me stop troubleshooting to pack) and low and behold it was the dang second fuse under the hood that was bad. When I checked the first time I just did a quick flashlight inspection in the dark, this time I pulled them all and found the bad one was blown on the side of the fusible link (not in the middle). Thanks for all the input! I feel Like an idiot. :doh0715:
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miesk5
yo,
yw
Glad to help and to see you diy!
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