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  #1  
Old 05-31-2007, 03:18 AM
scoodidabop's Avatar
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Join Date: May 2006
Location: Houston, TX
Posts: 381
Melted fuse panel! Woohoo!

Here's one that really grinds my gears; ('82 300td, btw)

About 6 months ago, my radio stopped working all the sudden. So I checked the fuse panel. #2 radio fuse looks good. Red aux fan fuse, not so good. I also noticed the bottom terminal of the aux fan fuse holder has a red sheathed stranded copper wire wrapped around it.... weird... so I replace the fuse, and bada-bing! Working radio.

So, my radio goes out again. I proceed to check the same fuse and what do I see??? The plastic around the top terminal has melted and nearly completely swallowed the terminal!! I said to myself, "Self, that red random wire can't be good. Pull it out." So I pull it out very easily. No resistance. Popped a new fuse in, and hear the aux fan come on. Fuse terminals still functional. Good. Radio? No go!! So... where could that red wire have been connected? I checked my voltage at the radio, and it was coming in low, like 11.4a at idle. But... at the battery I was getting 11.83. Too low, right? Brand new battery, bought it today. I think I didn't have my meter set right. I'll double check that for sure.

Anyway, what in the world could that red wire have been connected to? The wire was about 3 ft. long.

Ideas? I'd love to have a working radio again!

Thanks guys.

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09
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  #2  
Old 05-31-2007, 10:08 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
that sounds like some hack wired in power to the radio for clock and station retention, and something hairy happened.
fun.
john
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #3  
Old 05-31-2007, 11:29 AM
scoodidabop's Avatar
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Yeah, that's what I figure.

Is it common to have to rig up something like that to get an aftermarket radio to work?
__________________
'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09
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  #4  
Old 05-31-2007, 11:32 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
only if you want the radio presets and clock to work.
most use better judgment finding a good circuit though. and better connections too!
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #5  
Old 05-31-2007, 11:44 AM
scoodidabop's Avatar
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Join Date: May 2006
Location: Houston, TX
Posts: 381
So where do you suppose the connection terminated? I couldn't see it when I had the radio pulled out...
__________________
'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09
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  #6  
Old 05-31-2007, 12:23 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
try getting a helper to tug on the wire, while you search under the dash for it. follow it until it ends.
John
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 05-31-2007, 12:48 PM
scoodidabop's Avatar
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Join Date: May 2006
Location: Houston, TX
Posts: 381
Okay, new development...

I replaced all the fuses in my fuse box. With the car off, I read 12.2v on the battery. When idle, she drops to 11.4v. When revved, the highest she'll go is 11.84v. So the alternator is charging, but not NEARLY high enough. Bad alternator? I checked the brushes about 6 months ago, and they were okay. Should I check those first?

Thanks!
__________________
'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09
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  #8  
Old 05-31-2007, 05:38 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 5,177
Voltage regulator could be bad as well.

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RRGrassi


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