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Blinker probs


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#1 Muddog7375

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Posted 13 October 2009 - 11:27 PM

Ok heres whats going on..As of a few nights ago I have changed all the wiring in the 79 Bronco...When I say all the wiring I mean it all...I even switched out the blinker wires in the steering column also the light switch

There are no cuts or broken wires..I actually took all the harnesses apart & re taped them...

These are the only grounds Iv found on the truck..

Motor to body
motor to batt
body to frame
2 taillight
2 headlight
1 under the dash to the steering wheel mount

I have now run all grounds to the frame & added 3 more from the body to the frame & batt to body

I took a grinding wheel to each mount so they are all bare metal to bare metal

Heres what the lights are doing...

Left blinker works
Left blinker works with headlights on but slow

Right blinker acts like flashers
right stop flashing with headlights on except left blinker

flashers work except left flasher/blinker
flashers stop with headlights on

Break on right blinker all flash except left turn/blinker
break on left blinkers work

break on headlight on left blinker doesn't work
Work slow with parking light on then stop


So theres the lay out ....Any Ideas??...Its really ticking me off & this is all I need to get working to drive it....


Thanks
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#2 Bronc76

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Posted 17 October 2009 - 06:11 PM

Did you check to make sure that the chassis to column harness is not loose?

#3 Muddog7375

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Posted 18 October 2009 - 01:32 PM

Did you check to make sure that the chassis to column harness is not loose?



YES.....Its so dang frustrating...

#4 Bronc76

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Posted 18 October 2009 - 02:26 PM

I'm assuming that the bulbs were working fine before the rewiring so I can eliminate the theory of corroded sockets or incorrect bulbs were installed. This may not be your problem but have you thought about maybe replacing the turn signal switch?

#5 Muddog7375

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Posted 18 October 2009 - 09:56 PM

I'm assuming that the bulbs were working fine before the rewiring so I can eliminate the theory of corroded sockets or incorrect bulbs were installed. This may not be your problem but have you thought about maybe replacing the turn signal switch?



I did....100% of the wiring has been changed over to another 100% working harness

#6 alaska mike

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Posted 26 December 2009 - 01:20 PM

Did you ever fix your problem?

#7 1978BroncoCustom

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Posted 22 July 2017 - 04:54 PM

I've got a similar problem and am looking for advice/solutions. With the headlights off left blinker works normally, right blinker (front and rear) blink slow. When the headlights are turned on the left blinker works normally and the right blinker (front and rear) lights go out and the indicator does not illuminate or flash on the instrument cluster. Plan to check fuses and grounds (chases, light sockets, etc) and bulbs. Has anyone seen this before or have any suggestions on what I should check first? Initially I thought it was the flasher relay going bad, but after reading this thread I am not so sure.

1978 Bronco 400M


#8 miesk5

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Posted 23 July 2017 - 03:50 AM

Yo 1978BroncoCustom,

Check the bulb flashing too slow. 

Check for loose connections or corrosion at the bulb socket.

Both turn signals on one side don't work 8852DC3.gif Check for bad bulbs.

Check for bad grounds In both housings.

by http://www.procarcare.com

¤

Go through the wiring diagrams and troubleshooting in 1979 Bronco/F Series Electrical & Vacuum Troubleshooting Manual by topsig (Ziggy) @ http://www.supermoto...y/24302/83503-2

Same for your 78

¤

SEE PAGES:

20 

21 contains ground locations

& 22 

●Headlights share grounds with turn signals lamps.

GL!

Al 


96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#9 1978BroncoCustom

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Posted 23 July 2017 - 02:09 PM

Thanks Al for the wiring guide link. As soon as the heat breaks some I'll start with the grounding points for the headlights.

V/R

Jim

1978 Bronco 400M


#10 1978BroncoCustom

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Posted 23 July 2017 - 05:01 PM

Working from the outside In on my blinker problem. Checked all bulbs and sockets, cleaned both with an electrical water displacing lubricant; checked and cleaned grounds and grounding points with no change. Tomorrow I will move to the inside to check the fuse block and the steering column ground, followed by replacing the blinker relay if required. The current symptoms have not changed from the above, but I did notice that the blinker lights on the right side are dimmer than the left. Please advise if there is anything that I may be overlooking or if you have seen similar blinker issues. Thanks again for the assistance.

V/R

Jim

1978 Bronco 400M


#11 miesk5

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Posted 24 July 2017 - 04:01 AM

Yo Jim,

You are on the right path.

Continue to follow the troubleshooting on page 22 of the EVTM. 

Hopefully, the turn signal switch is ok.


96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#12 1978BroncoCustom

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Posted 24 July 2017 - 12:42 PM

Moved to the inside this afternoon, checked the fuse and fuse block, along with ground wire mounted on the steering support frame. Next I changed out the turn signal relay as a last resort with no change in symptoms. Tomorrow I will use a test light to check the integrity of the ground wires on the front and rear lights. If no broken ground is found it will be time to order a turn signal switch from LMC.

1978 Bronco 400M


#13 miesk5

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Posted 25 July 2017 - 03:29 AM

Yo Jim,

I will look for the turn signal switch troubleshooting.


96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#14 miesk5

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Posted 25 July 2017 - 04:09 AM

Yo Jim, 

Some more tests by friends:

With headlights are turned on, pull a bulb on side not working, turn on parking lights and see if turn indicator is lit.

Could be just a bulb whose filament breaks off and welds across both

terminals inside the bulb.

 

Clean the sockets' contacts w/ a small nail file or piece of sand paper or emery cloth.

 

Check the turn signal harness by the steering column.
Test these wires for batty voltage  to the turn signals:
green W/white stripe = left front

yellow W/black stripe = left rear

white W/blue stripe = right front

solid green = right rear

Check and see if you have power at those wires, if there is power there the switch is good and you have a problem with the wiring harness going to the turn signal socket's. If you have no power there then I would figure it's  a bad turn signal switch.


96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#15 1978BroncoCustom

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Posted 28 July 2017 - 01:44 PM

Three of four park light and tail light light sockets were bad. Have them on order and will install next week after I come off shift. Thank you for the lighting trouble shooting guide Al as it will help with installation and additional trouble shooting if the sockets don't fix it.

1978 Bronco 400M


#16 miesk5

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Posted 28 July 2017 - 03:28 PM

Yo Jim,
Great!
YW.
Thanks for the update Jim.
96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!

#17 Elmo

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Posted 29 July 2017 - 08:48 AM

how did it turn out ?


http://www.supermotors.net/21604 1990  5.8L (totaled)

 

1990 F-150 4.9 5 spd, 2 wd, a/c p/s p/b cruise long wheelbase plain jane beat around work truck.   


#18 1978BroncoCustom

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Posted 03 August 2017 - 11:54 AM

Success! Changed out all four sockets, replaced all four bulbs, cleaned and checked all aforementioned grounding points; all lights and blinkers work as they should. Thank you Al for the diagrams and recommendations as it gave method to my approach to trouble shooting. One recommendation would be to wear your glasses when reconnecting all the wiring as brown begins to look a lot like black on about the fourth socket. Thank you again for the assistance.

1978 Bronco 400M


#19 miesk5

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Posted 03 August 2017 - 04:36 PM

Yo Jim,

Great!

TY for the update Jim.

Al 


96 XL 5.0 E4OD, Manual BW 1356, manual hubs. See my partially recovered Bronco site. I need to clean up dead links & add many more. Thanks you Mr, Schwim! http://schwimserver5.com/?index=1128
THANKS to ALL WHO SERVE!



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