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> Where there's smoke...
flipb
post Oct 21 2009, 04:01 PM
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Why, oh, why, can't anything be simple??

I've been planning to pull off my instument panel to fix my odometer and replace the bulbs for night-time IP lighting.

The bulbs came today from PP and I ran out, eager to do something relatively simple. Unscrewed the IP and tilted it out. I admit, I was intimidated by the number of wires and decided to see if I could replace the IP lights (at least on the Tach) with everything still hanging out of the dash. There's one bulb near the top of the tach that was easy to pull. I took the bulb out of the socket and replaced it with a new one.

Turned the ignition to On, tried the lights, and the new bulb didn't light. Figured I didn't have it seated correctly in the holder, fidgeted and tried again. No light. I put the old bulb back into the holder and tried the lights...

Low hissing sound and LOTS of smoke from behind the IP. I'm guessing that by pulling on the IP, I shorted some wire back there? Can't tell the exact source of the smoke.

I don't have a lot of experience with electrical. What's my next move?
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agentblr
post Oct 21 2009, 05:21 PM
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I think the green and white wire is the high beam indicator lamp,better check the whole circuit...
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flipb
post Oct 21 2009, 05:25 PM
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QUOTE(agentblr @ Oct 21 2009, 07:21 PM) *

I think the green and white wire is the high beam indicator lamp,better check the whole circuit...


Interesting.

There are two green & white wires. Both come out of the bundle in my second picture. The one that goes to the right goes to the tach, and I presume is for the high beam indicator - which does not work. This one is white with green bands every couple inches.

The one that comes out to the left goes to the Speedo. It's white with a lengthwise green stripe/spiral. That's the one that's fried. Does it command the parking lights indicator? My parking light indicator stays on whenever any lights are on (parking, low beams, high beams, doesn't matter).

Does this help point to potential root cause?
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VaccaRabite
post Oct 22 2009, 08:46 AM
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QUOTE(flipb @ Oct 21 2009, 06:25 PM) *

Interesting.

There are two green & white wires. Both come out of the bundle in my second picture. The one that goes to the right goes to the tach, and I presume is for the high beam indicator - which does not work. This one is white with green bands every couple inches.


Check the wire diagram on your haynes manual. It will tell you exactly what wire it is.

Then cut all out all the burned section, use a butt connector to put in the new length of wire, and heat shrink rap the butt connector and an inch or two of wire to either side. Then use some non-black electrical tape and a sharpie marker to make a flag near the terminal that states what the wire is for future reference.

This is the non-DAPO (and also the "I don't want a flaming car") way to fix the issue.

And, yeah. Check the circuit.

Zach
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kenshapiro2002
post Oct 22 2009, 08:29 PM
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Shocked...even I solder (then shrink wrap) and I'm a Rookie !

QUOTE(Vacca Rabite @ Oct 22 2009, 10:46 AM) *

QUOTE(flipb @ Oct 21 2009, 06:25 PM) *

Interesting.

There are two green & white wires. Both come out of the bundle in my second picture. The one that goes to the right goes to the tach, and I presume is for the high beam indicator - which does not work. This one is white with green bands every couple inches.


Check the wire diagram on your haynes manual. It will tell you exactly what wire it is.

Then cut all out all the burned section, use a butt connector to put in the new length of wire, and heat shrink rap the butt connector and an inch or two of wire to either side. Then use some non-black electrical tape and a sharpie marker to make a flag near the terminal that states what the wire is for future reference.

This is the non-DAPO (and also the "I don't want a flaming car") way to fix the issue.

And, yeah. Check the circuit.

Zach

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flipb
post Oct 22 2009, 08:55 PM
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QUOTE(kenshapiro2002 @ Oct 22 2009, 10:29 PM) *

Shocked...even I solder (then shrink wrap) and I'm a Rookie !



Ken, there's a whole thread out there that undermines your claim to be a rookie when it comes to matters electrical.

I have a $5 soldering iron... might give it a shot.
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Posts in this topic
flipb   Where there's smoke...   Oct 21 2009, 04:01 PM
Vacca Rabite   Pull out everything that is in the way of you gett...   Oct 21 2009, 04:12 PM
flipb   Culprit was a green/white wire that goes into the ...   Oct 21 2009, 04:23 PM
flipb   And for the several times I've probably forgot...   Oct 21 2009, 04:27 PM
Gint   And for the several times I've probably forgot...   Oct 22 2009, 08:51 AM
jmill   You have to understand one thing. No matter what y...   Oct 21 2009, 04:52 PM
flipb   I like illustrating things. Here's the culpri...   Oct 21 2009, 04:52 PM
KaptKaos   Might be easier if you remove the steering wheel, ...   Oct 21 2009, 04:56 PM
flipb   Might be easier if you remove the steering wheel,...   Oct 21 2009, 05:20 PM
Spoke   First thing to do when noodling around behind the ...   Oct 21 2009, 05:02 PM
agentblr   I think the green and white wire is the high beam ...   Oct 21 2009, 05:21 PM
flipb   I think the green and white wire is the high beam...   Oct 21 2009, 05:25 PM
Vacca Rabite   Interesting. There are two green & white wi...   Oct 22 2009, 08:46 AM
kenshapiro2002   Shocked...even I solder (then shrink wrap) and I...   Oct 22 2009, 08:29 PM
flipb   Shocked...even I solder (then shrink wrap) and I...   Oct 22 2009, 08:55 PM
kenshapiro2002   Well...I was a Rookie three weeks ago. Now I'm...   Oct 22 2009, 09:04 PM
ahdoman   KaptKaos is right - take off the steering wheel an...   Oct 22 2009, 02:09 PM
flipb   FWIW, I'm not using LEDs. Just replacing the I...   Oct 22 2009, 07:15 PM
SLITS   It's white w/ green trace. On a '74 it go...   Oct 22 2009, 03:29 PM
bandjoey   U Electrical Mechanics can chime in on this: Was t...   Oct 22 2009, 04:21 PM
neil30076   U Electrical Mechanics can chime in on this: Was ...   Oct 22 2009, 04:45 PM
rick 918-S   U Electrical Mechanics can chime in on this: Was...   Oct 22 2009, 05:18 PM
SLITS   [quote name='neil30076' post='1229221' date='Oct ...   Oct 22 2009, 06:36 PM
JazonJJordan   :popcorn: hhummm... U Electrical Mechanics can ch...   Oct 22 2009, 08:08 PM
bandjoey   You might Get a set of LED while you're at it....   Oct 22 2009, 07:25 PM
Mikey914   The LEDs run on 2.7 volts, so if your grounds are ...   Oct 22 2009, 07:44 PM
Mikey914   This is the same set of gages in Mikey's car, ...   Oct 22 2009, 07:55 PM
Vacca Rabite   different schools of thought. Some say that solde...   Oct 23 2009, 10:18 AM
kenshapiro2002   Yeah...I've had mechanical connections come lo...   Oct 23 2009, 10:43 AM


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