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Both rear brake lights, rear turn signals and rear hazard lights not working

Tiny
MBACAJUN
  • MEMBER
  • 2006 FORD FOCUS
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 86,000 MILES
Front turn signals and hazards work in the front.

Troubleshooting:

1. Visually inspected wiring for bad wires or corrosion - Nothing found, Visual checks out okay.
2. Replaced both bulbs with new bulbs. - No change.
3. Replaced Brake light switch - No change.
4. Replaced Blinker switch in steering console. - No change.
5. Checked fuses - fuses good.

What's next? What else is there?
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Monday, June 17th, 2019 AT 1:53 PM

21 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Hello,

If the fuses are good it sounds like the GEM is out and needs to be replace. Here is the location and instructions on how to replace it below. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Tuesday, June 18th, 2019 AT 7:08 PM
Tiny
MBACAJUN
  • MEMBER
  • 3 POSTS
Looks like the hardest thing to do is to figure out how to afford a GEM change. I need to find someone that can remove the data and put it in the new one. Ford dealerships charge a ridiculous amount. If anyone has any suggestions, is this something I can do with the right software?
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Wednesday, June 19th, 2019 AT 9:20 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Not really, you must be able to transfer data. I have heard of some success trying a used unit but I cannot confirm if it will work 100% Try calling around to different independents to see what they can do and let me know.
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Thursday, June 20th, 2019 AT 11:59 AM
Tiny
MBACAJUN
  • MEMBER
  • 3 POSTS
Good news, I did not have to replace the GEM. Thank you Jesus! Talking to a mechanic at a local shop he said he wanted to start from the beginning. He check the fuses and wiring and all was good. Then he check the bulbs. I told him I put new ones in. Bulbs were good, however, he said he wanted to try a different bulb anyway. He changed from a 3157 bulb to a 3057 and it worked. Say what?
The book in the parts store calls for a 3157 bulb, what I pulled out of the car was a 3158. Parts store didn't have a 3158 so I went by the book recommendation 3157. Apparently the book is wrong. The mechanic said something about how he prefers the 3057 for some reason I can't remember. I was just thrilled it works now!
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Wednesday, June 26th, 2019 AT 8:33 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Wednesday, June 26th, 2019 AT 11:20 AM
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
  • 2002 FORD FOCUS
  • 4 CYL
  • AUTOMATIC
  • 170,000 MILES
Just got the car home from the shop and had no hazard flashers or turn signals.
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
The system goes through the Generic Electronic Module from the fuses and turn signal/hazard ight switches.
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
What is that and where is it located?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
It is a small box for controlling a few functions and is located at right side A pillar.

Heres a guide on turn signal problems, it will help

https://www.2carpros.com/articles/turn-signals-not-working-blinker

Attached below is the wiring diagrams for your turn signals
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
Do you have a diagram for the location of the relays in this. I cant find one anywhere. I have moved around the relays that are same and still nothing. Is there a seperate relay for hazards and turn signals
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
There is not a relay in the GEm for the turn signals or hazard flasher. There is only a fuse and it is good. Also have changed the turn signal switch on the column still no turn signals or flashers. Any help?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
The GEM is a control unit by itself and do not have any relays that are detachable. You need to perform wiring and power supply checks. You mentioned getting the vehicle back from the shop. Waht was done at the shop and was problem there before sending it in?

Are you able to perform checks with a DVOM or test light?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
MHINTON
  • MEMBER
  • 3 POSTS
  • 2001 FORD FOCUS
  • 0.6L
  • V6
  • 2WD
  • AUTOMATIC
My left side bleaker light, turn signal, and hazard light does not work
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
Had timing belt and water pump replaced.
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
SINBAD271
  • MECHANIC
  • 169 POSTS
Have you checked the bulb?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Did the hazard and turn signals work before the work?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
MHINTON
  • MEMBER
  • 3 POSTS
Yes. And I try to see if there were any broken fuses also
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
BLUEEYESPDC
  • MEMBER
  • 36 POSTS
Yes as far as I know they did.
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
SINBAD271
  • MECHANIC
  • 169 POSTS
Disconnect harness for that side and check for power and ground on that side
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)
Tiny
MHINTON
  • MEMBER
  • 3 POSTS
How will I know how the Harness look like?
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Wednesday, June 26th, 2019 AT 11:20 AM (Merged)

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