Turn signal, brake right side short

[thomas r whitton]

I am blowing fuses immediately when I press on the brake pedal or turn the turn signal to the right. This appears to be a dead short somewhere.  The left side works fine.  I have probably spent 10-12 hours tracing and examining wires and connections but haven't found the problem.  Does anyone have a suggestion on what this might be or where to look next?  Obviously, I can't drive more than around the block until this is fixed.  Appreciate suggestions and ideas...
All the best,Tom Whitton26 foot updated GMCPaducah, KY

 

[Matt Colie]

> I am blowing fuses immediately when I press on the brake pedal or turn the turn signal to the right. This appears to be a dead short somewhere. 
> The left side works fine.  I have probably spent 10-12 hours tracing and examining wires and connections but haven't found the problem.  Does
> anyone have a suggestion on what this might be or where to look next?  Obviously, I can't drive more than around the block until this is fixed. 
> Appreciate suggestions and ideas...
> All the best,Tom Whitton26 foot updated GMCPaducah, KY

Tom,

In the time I have been doing auto electrics, I have twice had bulbs get loose in the base and short out. Try that first. If you take the bulb out
and the fuse don't blow - you got one.

I do not believe that there is any intentional ground in the signal switch assembly.

Where I would go now: Get a signal tracer and attach it at the light connections in the rear. Follow the annoying noise until it stops and then try
to figure out what happened there.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Still Loving OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[terry1]

As Matt said, remove the bulb from the rear and see if the fuse still blows. I've had at least a dozen shorted bulbs cause this problem in my lifetime
of being Mr Fixit. Let us know the results and we will go from there.
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[jim wagner]

Tom.
You might want to check the screws that hold the left rear tail light assy. On our Glenbrook the tail light wires run right behind the light. When I
installed the newer style light the screws were too long and shorted out the lights.
Hope you find the problem soon. I don't think many people would know you were going to turn just because you had your arm out the window

I am blowing fuses immediately when I press on the brake pedal or turn the turn signal to the right. This appears to be a dead short somewhere.  The
left side works fine.  I have probably spent 10-12 hours tracing and examining wires and connections but haven't found the problem.  Does anyone
have a suggestion on what this might be or where to look next?  Obviously, I can't drive more than around the block until this is fixed.  Appreciate
suggestions and ideas...
All the best,Tom Whitton26 foot updated GMCPaducah, KY

Jim Wagner
Brook Park, oh
76GMC500
71 Vega355
69 Vette383

 

[thomas phipps]

Move to Alabama, there is a great number of vehicles that have or don't use turn indicators, or even brake lights.
Dash camera is a good investment here.
Tom, MS II
--
1975 GMC Avion
KA4CSG

 

[Jerry Wheeler]

What dash camera are you using Thomas Phipps?? I have to deliver a 78
Royale to Emmett, Idaho, in mid May; I plan on purchasing one. Driving
from NC.

JR Wheeler 78 Royale NC/OR

> Move to Alabama, there is a great number of vehicles that have or don't
> use turn indicators, or even brake lights.
> Dash camera is a good investment here.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[hal stclair]

Have you done any work inside lately? I had an issue after redoing the kitchen cabinet. Apparently I ran a screw into the bundle of wires that go to
the rear lights when installing the shelves under the sink (RB Royale). Those wires run through the wall on the left (drivers) side of the coach. If
you've done any work on that side that involved driving screws into the wall that might be your problem.
Just a guess, Hal
--
1977 Royale 101348,

1977 Royale 101586, Diesel powered,

1974 Eagle Bus 45',w/slideout

 

[thomas r whitton]

Please let me make you aware that Yahoo email places question marks (?) aft=
er every period in a message.=C2=A0 I'm going to switch to another system.=
=C2=A0 Until then, ignore the questions marks.=C2=A0 Sorry, these question =
marks make reading email messages harder.=C2=A0 Billy Massey has offered to=
help switch systems. Update on the turn signal short problem.Thanks for =
your suggestions.=C2=A0 Here's what I have done today.=C2=A0 I removed the =
right rear tail light assembly.=C2=A0 Fuses still blow when brakes, flasher=
s or right turn signal are applied.=C2=A0I also disconnected the large 10-w=
ire connector on the side of the steering column and took ohm readings on t=
he disconnected wires running up the column.=C2=A0 The readings all read ze=
ro.=C2=A0 I then took ohm readings on the disconnected load wires.=C2=A0 He=
re I received some low ohm readings showing resistance on the wires running=
to the turn signals.=C2=A0 I did this test in a hurry and plan to do it ag=
ain tomorrow to double check the readings.=C2=A0 But, at least for now, I'm=
thinking the short problem isn't in the turn signal switch inside the colu=
mn but somewhere in the wiring leading to the front or rear lamps.=C2=A0 I =
have checked this wiring closely but apparently not close enough.=C2=A0 Sin=
ce there were no screws in the right tail light assembly during the testing=
,=C2=A0I'm thinking it is probably=C2=A0doubtful that mounting screws are c=
ausing the problem.=C2=A0 Of course, anything is possible.=C2=A0 If anyone =
has a suggestion for isolating the short by all means please let me hear it=
.=C2=A0 This has become a huge aggravation.=C2=A0 I look forward to hearing=
from you. Thanks, Tom Whitton26 foot updated GMCPaducah, KY Or=
iginal message: I am blowing fuses immediately when I press on the brake =
pedal or turn the turn signal to the right.?This appears to be a dead short=
somewhere.=C2=A0 The left side?works fine.=C2=A0 I have probably spent 10-=
12 hours tracing and examining wires and connections but haven't found the =
problem. =C2=A0Does anyone have a suggestion on what this might be or where=
to look nex Obviously, I can't drive more than around the block until this=
is fixed. =C2=A0Appreciate suggestions and ideas...

 

[terry1]

Check the resistance to ground on the green wire running back to the right rear bulb. check it with both ends disconnected. CHECK THE TRAILER
CONNECTOR WIRING...man has that got me a few times...there should be infinite resistance to ground on that green wire when both ends are disconnected
(at the column and at the bulb). Also look for 1 strand of wire to have come out of the crimped terminal that is in the bulb socket possibly
contacting the socket. You will have to push both wires and the insulating plate up out of the socket to inspect them.
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[hal stclair]

Just another 'guess' for you. If you have a connector for a trailer it might be a good place to look. They are notorious for problems and an easy
check. I always try to remember (much harder these days :lol: ) anything I have done recently that might be even remotely associated with the problem.
Just plugging in a trailer/toad may dislodge a loose wire. Just guessing from afar.
Hal
--
1977 Royale 101348,

1977 Royale 101586, Diesel powered,

1974 Eagle Bus 45',w/slideout