WTF hazards!!!!
Thread Starter
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Posting Guru
Joined: Dec 2006
Posts: 1,081
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From: Gladwin,Mi
WTF hazards!!!!
I passed a semi on a 2lane earlier.....well,he flashed his lights so I got back over....to thank him I hit my 4way's.....when I did my RPM's jumped up by about 300???????turn the 4ways off,about a second later RPM's went back to normal.Thought it was a fluke...but tried it a few other times and same thing....so....WTF?????no jump in speed or anything...kinda like the trans is slipping.This was at a steady speed(65mph),not increasing.
this happen to anyone else?(if not...I wish I had a dollar for everyone that does try it on there way home from work)
97 auto
this happen to anyone else?(if not...I wish I had a dollar for everyone that does try it on there way home from work)
97 auto
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
BTW: Don't drive above 40-45 MPH with the flashers on until this is fixed, your trans will burn up if it's the converter locking/unlocking.
Here's more info:
https://www.ford-trucks.com/forums/6...ghts-e40d.html
Here's more info:
https://www.ford-trucks.com/forums/6...ghts-e40d.html
Thread Starter
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Posting Guru
Joined: Dec 2006
Posts: 1,081
Likes: 0
From: Gladwin,Mi
BTW: Don't drive above 40-45 MPH with the flashers on until this is fixed, your trans will burn up if it's the converter locking/unlocking.
Here's more info:
https://www.ford-trucks.com/forums/6...ghts-e40d.html
Here's more info:
https://www.ford-trucks.com/forums/6...ghts-e40d.html
Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
You have a malfunction in the multi-function switch or a burned out third brake light bulb if the TC is unlocking.
When the hazards activate, the multi-function switch disconnects the brake light line from the tail lights. The third brake light isn't supposed to light with the flashers.
If the third brake light bulb is burned out, there is no longer a ground on the brake light switch and the PCM will unlock the TC. Note that it will also cancel the cruse control and if you're towing a trailer, the trailer brakes will activate with the hazards on.
When the hazards activate, the multi-function switch disconnects the brake light line from the tail lights. The third brake light isn't supposed to light with the flashers.
If the third brake light bulb is burned out, there is no longer a ground on the brake light switch and the PCM will unlock the TC. Note that it will also cancel the cruse control and if you're towing a trailer, the trailer brakes will activate with the hazards on.
Posting Guru
Joined: Feb 2008
Posts: 1,526
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From: Grass Valley, CA
Trending Topics
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
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From: Celaya, Gto. MX
Have any of you used a pulse preventor like this ones:
http://www.dyersonline.com/Products/Tekonsha-Pulse-Preventor__96-8384.aspx
http://www.brake-controllers-usa.com/products/Pulse_Preventor,20501
http://www.dyersonline.com/Products/Tekonsha-Pulse-Preventor__96-8384.aspx
http://www.brake-controllers-usa.com/products/Pulse_Preventor,20501
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Postmaster
Joined: Nov 2006
Posts: 2,609
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From: somerset KY
thank God someone figured this out! mines been dong it for like ever. i replaced the multi-switch and everything. and yes, i do have a burned out third brake light. i been too forgetfull to replace it. i posted awhle back about this.
Senior User
Joined: Apr 2007
Posts: 344
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From: Texas
Yea I agree with this. mines been doing this also.. But i replaced all the lights up there last weekend just because.. haven't even tested it out yet.. Thanks guys
never would have thought about this.. freaked me out on the way to Dallas towing a car a couple of weeks ago.. cruise kicked off and the damn truck surged exactly as he said. nobody I ask knew why.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
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From: Celaya, Gto. MX
Tuned
Joined: Jun 2004
Posts: 472
Likes: 4
From: Goodyear, AZ
I know that if I'm toying the toy hauler, bad things happen if I turn on my hazzard lights, it pops a fuse and locks the tranny up to where I can't shift out of park, and the ABS light comes on, but change the fuse, and no hazzards with the trailer hooked up and I'm good.