Very Strange Electrical Problem
Thread Starter
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Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
Very Strange Electrical Problem
Hey Everyone,
Have any of you heard of this problem.
Just before I come to a stop the HVAC system turns off and the airbag warning light turns on in the instrument cluster.
Then when I pull away from the stop the HVAC system returns to the settings I had it set at and the airbag light goes off.
The radio and navigation system are not effected.
Has anyone heard of this before?
Thank you.
Have any of you heard of this problem.
Just before I come to a stop the HVAC system turns off and the airbag warning light turns on in the instrument cluster.
Then when I pull away from the stop the HVAC system returns to the settings I had it set at and the airbag light goes off.
The radio and navigation system are not effected.
Has anyone heard of this before?
Thank you.
Elder User
Joined: Jul 2017
Posts: 622
Likes: 6
From: Gladys, VA
I was thinking it could be something with the "Battery Management System". The manual states the BMS could cut off the Climate Control but the Airbag Light don't make sense. Guess this may not apply.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Video it with someone in the cab, take it to your dealer and have them do a ride along and show them how it reproduces the faults. Thins needs to be addressed and registered under warrenty.
Sure seems strange like something is not connected properly, and stopping it un connects?
Sure seems strange like something is not connected properly, and stopping it un connects?
Elder User
Joined: Jun 2017
Posts: 685
Likes: 4
There were some other threads addressing a similar problem. One of them turned out to be a connector/harness issue over the fuel tank or spare tire, not sure. Another was a connector behind the dash in the radio area. Electronics are a funny thing, one small pin getting damaged in a connector can cause numerous problems.
Thread Starter
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Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
There were some other threads addressing a similar problem. One of them turned out to be a connector/harness issue over the fuel tank or spare tire, not sure. Another was a connector behind the dash in the radio area. Electronics are a funny thing, one small pin getting damaged in a connector can cause numerous problems.
That's good info. It has to be something like that...I have not changed anything on my electronics at all for months (I can see the dealer blaming this on my LED tail lights right now)...but I know they are not the cause.
Truck goes in tomorrow AM. Early.
Tuned
Joined: Oct 2010
Posts: 391
Likes: 36
Thank you for that info! This is such a hard topic to run a search for here on the forum.
That's good info. It has to be something like that...I have not changed anything on my electronics at all for months (I can see the dealer blaming this on my LED tail lights right now)...but I know they are not the cause.
Truck goes in tomorrow AM. Early.
That's good info. It has to be something like that...I have not changed anything on my electronics at all for months (I can see the dealer blaming this on my LED tail lights right now)...but I know they are not the cause.
Truck goes in tomorrow AM. Early.
Did you happen to notice if your engine rpms dropped at all when the symptoms exist? Almost seems like an under-voltage condition, and the BMS is having a hard time responding correctly.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Have you taken it to the dealer to have them look at it? Prolly only be a couple thousand $$ or so, maybe a month or two, and get ya all fixed up.
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Tuned
Joined: Feb 2018
Posts: 325
Likes: 8
From: Central Ohio
There were some other threads addressing a similar problem. One of them turned out to be a connector/harness issue over the fuel tank or spare tire, not sure. Another was a connector behind the dash in the radio area. Electronics are a funny thing, one small pin getting damaged in a connector can cause numerous problems.
https://www.ford-trucks.com/forums/1...nt-fix-it.html
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Thread Starter
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Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
Wow guys. That info is gold. Those issues mentioned in that thread you posted are exactly everything my truck is doing.
I’m dropping it back off at the dealer tomorrow so they can try again. I will let them know about this connector issue.
I really hope this fixes it.
‘’I will report back as I learn more in the next 2-3 days.
‘Thank you again.
I’m dropping it back off at the dealer tomorrow so they can try again. I will let them know about this connector issue.
I really hope this fixes it.
‘’I will report back as I learn more in the next 2-3 days.
‘Thank you again.
Thread Starter
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Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
Hey everyone. The good news is my connector was bad...I guess it looked exactly like the connector i the post above. The bad news is I have to wait until tomorrow or the next day to pick up my truck. The had to order the parts.
It sounds like the connector was the culprit. I won't know for sure until I can drive my truck around for a few miles.
Special thanks to Tony M 6.7 and psdxohio for all the help...links, etc. Very much appreciated!
I will report back when I know for sure it was this connector causing the issues.
It sounds like the connector was the culprit. I won't know for sure until I can drive my truck around for a few miles.
Special thanks to Tony M 6.7 and psdxohio for all the help...links, etc. Very much appreciated!
I will report back when I know for sure it was this connector causing the issues.
Elder User
Joined: Jun 2017
Posts: 685
Likes: 4
Hey everyone. The good news is my connector was bad...I guess it looked exactly like the connector i the post above. The bad news is I have to wait until tomorrow or the next day to pick up my truck. The had to order the parts.
It sounds like the connector was the culprit. I won't know for sure until I can drive my truck around for a few miles.
Special thanks to Tony M 6.7 and psdxohio for all the help...links, etc. Very much appreciated!
I will report back when I know for sure it was this connector causing the issues.
It sounds like the connector was the culprit. I won't know for sure until I can drive my truck around for a few miles.
Special thanks to Tony M 6.7 and psdxohio for all the help...links, etc. Very much appreciated!
I will report back when I know for sure it was this connector causing the issues.
Glad to help. I've always believed that we learn something new every day.
Thread Starter
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Fleet Mechanic
Joined: Aug 2017
Posts: 1,274
Likes: 26
From: St Louis Suburbs
You guys should get paid a commission!
Elder User
Joined: Jun 2017
Posts: 685
Likes: 4
That's what I've been reading here also. I think the temporary fix is to clean the terminals and apply dielectric grease until the new harness arrives.
Senior User
Joined: Oct 2006
Posts: 165
Likes: 1
From: Calgary, Canada
Redrocket.....im curious how many miles you had on your truck before the electrical problems started? My truck arrives next week and I’m thinking I should just wrap that connector in plastic first thing to keep it dry and free of problems.