I managed to sort this out today before I hit "post" for help, but here is the problem and resolution:
95 850 R with factory amp at radio/heater core area and CD player in trunk.
Radio fuse (#7) blows instantly, key on or key off doesn't matter. Constant 12V across the socket according to my meter.
Removed radio and ECC unit and an't see any frayed wires at all in the radio/climate area.
What I did
- searched a bunch of old MVS threads
- found a post in this one really useful, by fazool (viewtopic.php?t=45058) explaining that power comes in from fuse #7 on two red-black wires
- after a series of "well it's not that" attempts (unhooking radio itself, CD player, etc. connectors) I figured out that unplugging the amp solved the problem. Amp is accessed from the driver's footwell.
Looks like a dead amp, not sure I will ever get to investigating that any further. Since the amp harness just plugs in between the regular harness, I could easily just switch back to un-amped setup and the radio makes noise again.
95 850 radio fuse #7 blown constantly, always 12V at fuse Topic is solved
- erikv11
- Posts: 11800
- Joined: 25 July 2009
- Year and Model: 850, V70, S60R, XC70
- Location: Iowa
- Has thanked: 292 times
- Been thanked: 765 times
95 850 radio fuse #7 blown constantly, always 12V at fuse
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
- erikv11
- Posts: 11800
- Joined: 25 July 2009
- Year and Model: 850, V70, S60R, XC70
- Location: Iowa
- Has thanked: 292 times
- Been thanked: 765 times
Option for MVS member amp repair: viewtopic.php?f=6&t=91782
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
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