72 sport lamp wires overheating
#1
My 72 mach 1 sport lamp wires started smoking last night when i turned the headlights on. I immediately turned off the lights and noticed the bulb melted on the bottom. The wires and bulb sockets were so hot i had to let the wires cool down. When i turned the headlights on, the headlights were dim. I wiggled the sport lamp bulbs and the headlights became strong and visible. I took both sport lamp bulbs out and the headlights were bright like they should have been. Any ideas on why the wires and bulb housing got super hot in less than a minute?
Reply
#2
Electrical is not my forte but I will get the response started and let someone more automotive electrically minded jump on and help.

Of course the obvious is that there is too high of amperage draw on the system from that source. It would seem to me that that means that either there is a short or the bulb is drawing excess amperage. Are the bulbs the correct factory units? The factory wiring will not handle more than the "dim" factory bulb.
Reply
#3
I took the bulbs out and wrote down what they say on them to check for verification correct bulb.
1156S lf
Osram Germany
13 5b 691

The bulb socket that the bulb connected to got so hot that it made the socket glow from how hot it got. Going to check the wiring, bc it looks a little burnt and see if something is touching that shouldn't be. Also was seeing if the wires going to the back of the socket were connected to the right places. Just got the manuals in for the car so gonna go threw it and see what i can find. Hopefully its a easy fix, bc the sport lamps look cool on the car.
Reply
#4
Sounds like you had a wire rubbing something metal causing a short to ground. Could very well be in the sockets themselves. The numbers on the bulb indicate an 1156 which is a very common single filament bulb which is the standard bulb for the sport lamps, so that is ok. Somewhere the insulation may have cracked or been incorrectly repaired etc, etc, etc. Good luck, I would start where the socket stared to glow as that is where it got the hottest and is usually the source, or very close to it. Hope it helps. JTS 71 Mach1
Reply
#5
(08-04-2014, 01:40 AM)72mach1 Wrote: The bulb socket that the bulb connected to got so hot that it made the socket glow from how hot it got.

As Jack has pointed out - there is the location of your "short".
Reply
#6
I went back and looked at the wires today, and man are they rough looking. Seems the wires are burnt and i am going to have to replace the wiring. the metal inside the bulb socket is what was glowing. Should i seek out used bulb sockets out of another 72 mach 1?
Reply
#7
I would replace with new wherever possible.

Touch base with Don Witt at Ohio Mustang Supply to see what is available.
Reply
#8
If I were you I wouldnt be so concerned with getting an "original" plug unless its a class 1 100 point vehicle. I have problems with my 70 too. they work fine then after a while they heat up and just go out then come on repeatedly. I had halogen bulbs and changed up to standards and installed a new switch. but the problem still persists. Not being able to use the car at night stinks!Angry After she comes back from the shop I will try to replace the regulator. If that doesnt work I will replace the wiring. Then if after that it doesnt work I will pull my hair out as I cant replace anything else.
Reply
#9
So this weekend i hope to tear open the wiring and replace the nasty burned up wires. If i am correct in 72 the sport lamps didn't come on unless you turn the headlights on. I have read a few posts that people have wired them to come on with just basic running lights for the cool look. I have been thinking about installing a switch to turn the sport lamps on and off with or without the headlights on for the look. If i do decide to do that i plan on hiding the switch so it doesn't take away from the originality of the car.

If i am going to need new sockets i plan on touching base with Don Witt.

yoinspect, good luck on your wire issues. If i can fix my problem ill let ya know how i did so.
Reply
#10
Today it was a crappy rainy day, so i tore into the electrical. I stripped some of the wires to see if they had any burn marks or broken joints. After doing that i got out my tester and checked the back of the light socket for power. Both sockets were getting power to the back of them. I stuck the tester inside the front of the socket and tried touching two of the metal conductors and nothing happened. I put new bulbs in to see if they would ignite, and nothing happened. I took them out after a quick second just incase b/c i didn't wanna blow the bulbs. they cost like 5 or 6 bucks for 2 so it could get real expensive just blowing bulbs.

Anyone think it could be the actual light socket?
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  OVERHEATING Robertb40 31 25,656 05-12-2012, 04:31 PM
Last Post: JTS71 Mach1
  spark plug wires... keith1562 2 3,573 10-01-2011, 11:35 AM
Last Post: 1969jimmach
  Coil wires... keith1562 4 5,050 09-01-2011, 09:13 AM
Last Post: Rare Pony
Shocked Can't identify 2 wires after engine installation zekegood 5 5,915 08-10-2011, 11:26 AM
Last Post: 70427w
  sport mirrors 72 mach 1.... keith1562 7 6,786 07-25-2011, 08:17 PM
Last Post: gxr02190
  Overheating (almost) coqjohn 5 5,491 07-01-2011, 03:45 AM
Last Post: coqjohn
  70 Mach 1 Sport Lamps Robertb40 0 2,852 11-06-2010, 02:48 AM
Last Post: Robertb40

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
Dash ignition light?
Last Post: JTS71 Mach1
Yesterday 10:37 AM
» Replies: 3
» Views: 206
"Jacobra"
Last Post: JTS71 Mach1
01-16-2019 02:21 PM
» Replies: 61
» Views: 11704
New addition to the stable..
Last Post: Steven Harris
01-16-2019 01:26 PM
» Replies: 5
» Views: 531
Alternator Light Won't go off
Last Post: 1969_Mach1
01-06-2019 05:35 AM
» Replies: 13
» Views: 1645
Merry Christmas 2018
Last Post: Steven Harris
12-30-2018 12:56 PM
» Replies: 10
» Views: 742
Led lights not all that good.
Last Post: John
12-28-2018 02:12 PM
» Replies: 24
» Views: 7903
66 Fairlane Project
Last Post: Steven Harris
12-28-2018 01:03 PM
» Replies: 538
» Views: 136683
"70 Mach 1 Fuel Line Routing
Last Post: 1969_Mach1
12-28-2018 06:07 AM
» Replies: 1
» Views: 376
"70 Mach 1 with TCI torque Tube Rear Sus...
Last Post: 70MACH427
12-28-2018 05:31 AM
» Replies: 0
» Views: 305
Rear Spoiler Pitch/angle
Last Post: John
12-23-2018 11:31 AM
» Replies: 3
» Views: 3736
Tachometer Wiring
Last Post: Mustangmike
12-19-2018 08:39 PM
» Replies: 10
» Views: 1044
New member 1969 Mach 1
Last Post: Mustangmike
12-17-2018 09:00 AM
» Replies: 11
» Views: 1976
351c wont start, help
Last Post: JTS71 Mach1
12-16-2018 08:26 AM
» Replies: 71
» Views: 5400
PCM keeps burning out have replaced for...
Last Post: Mustangbob
12-11-2018 10:58 AM
» Replies: 8
» Views: 1083
70 Boss 302 - Night Mission build blog
Last Post: JTS71 Mach1
12-07-2018 01:12 PM
» Replies: 109
» Views: 75560
My newest 1970 Mustang Fastback 302
Last Post: BLACK JADE 69
12-04-2018 12:08 AM
» Replies: 24
» Views: 3292
New guy with a question.
Last Post: 1969_Mach1
12-03-2018 06:57 AM
» Replies: 25
» Views: 1963
Dashboard lights REALLY dim, any fixes??
Last Post: Steven Harris
12-01-2018 12:04 PM
» Replies: 13
» Views: 14866
new member
Last Post: Steven Harris
12-01-2018 12:02 PM
» Replies: 4
» Views: 734
1971-73 "Clydesdales"
Last Post: Mister 4x4
11-29-2018 11:35 AM
» Replies: 26
» Views: 2232

>