06 F150 Crew Cab
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06 F150 Crew Cab
Help please. Just recently my door ajar lights have been acting goofy. I've tried the WD40 spray on drivers door. No luck. Then I get to checking the other 3 doors and none of them are registering open. I have a hard time believing all 4 switches bit the dust at the same time. My electric windows and locks work fine . My code reader (MaxiCom MK808)is showing an instrument cluster errorr code of U1950:60?
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From: Ocean Springs MS
"been acting goofy"
A more detailed description of the issue would be helpful.
U1950 is a network communications error. Of the many things that cause this error a bad ground can be the issue. The instrument cluster its self may be the problem.
For starters I would start by refreshing the fuses. I do not know the specific fuse for Door Ajar but it is F1, F15 or F27. I would pull each fuse, one at a time, check for continuity and replace. Take a picture before you start so that no confusion in regards to locations in the fuse box comes into play. Pulling and reinstalling the fuses refreshes the contact surfaces.
When "been acting goofy" comes into play on electrical systems my first thought a bad ground connection but there are two separate grounds associated with Door Ajar (G206 & G303) in a Crew Cab so If all doors are having a issue that's not likely the cause. If and when you look at the fuses, visually inspect the ground wires nearby, rusted or corroded connections need to be remedied in any case. Ground G206 is about a foot above the floor and sort of behind the wiring harness and may be hard to see. BTW grounds G202 & G203 are the ones near the floor board and are often a problem in older rust belt vehicles.
Ground G303 is behind the panel at the emergency brake pedal and about a foot above the floor.
A more detailed description of the issue would be helpful.
U1950 is a network communications error. Of the many things that cause this error a bad ground can be the issue. The instrument cluster its self may be the problem.
For starters I would start by refreshing the fuses. I do not know the specific fuse for Door Ajar but it is F1, F15 or F27. I would pull each fuse, one at a time, check for continuity and replace. Take a picture before you start so that no confusion in regards to locations in the fuse box comes into play. Pulling and reinstalling the fuses refreshes the contact surfaces.
When "been acting goofy" comes into play on electrical systems my first thought a bad ground connection but there are two separate grounds associated with Door Ajar (G206 & G303) in a Crew Cab so If all doors are having a issue that's not likely the cause. If and when you look at the fuses, visually inspect the ground wires nearby, rusted or corroded connections need to be remedied in any case. Ground G206 is about a foot above the floor and sort of behind the wiring harness and may be hard to see. BTW grounds G202 & G203 are the ones near the floor board and are often a problem in older rust belt vehicles.
Ground G303 is behind the panel at the emergency brake pedal and about a foot above the floor.
Thread Starter
Junior Member
Joined: Jul 2022
Posts: 6
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"been acting goofy"
A more detailed description of the issue would be helpful.
U1950 is a network communications error. Of the many things that cause this error a bad ground can be the issue. The instrument cluster its self may be the problem.
For starters I would start by refreshing the fuses. I do not know the specific fuse for Door Ajar but it is F1, F15 or F27. I would pull each fuse, one at a time, check for continuity and replace. Take a picture before you start so that no confusion in regards to locations in the fuse box comes into play. Pulling and reinstalling the fuses refreshes the contact surfaces.
When "been acting goofy" comes into play on electrical systems my first thought a bad ground connection but there are two separate grounds associated with Door Ajar (G206 & G303) in a Crew Cab so If all doors are having a issue that's not likely the cause. If and when you look at the fuses, visually inspect the ground wires nearby, rusted or corroded connections need to be remedied in any case. Ground G206 is about a foot above the floor and sort of behind the wiring harness and may be hard to see. BTW grounds G202 & G203 are the ones near the floor board and are often a problem in older rust belt vehicles.
Ground G303 is behind the panel at the emergency brake pedal and about a foot above the floor.
A more detailed description of the issue would be helpful.
U1950 is a network communications error. Of the many things that cause this error a bad ground can be the issue. The instrument cluster its self may be the problem.
For starters I would start by refreshing the fuses. I do not know the specific fuse for Door Ajar but it is F1, F15 or F27. I would pull each fuse, one at a time, check for continuity and replace. Take a picture before you start so that no confusion in regards to locations in the fuse box comes into play. Pulling and reinstalling the fuses refreshes the contact surfaces.
When "been acting goofy" comes into play on electrical systems my first thought a bad ground connection but there are two separate grounds associated with Door Ajar (G206 & G303) in a Crew Cab so If all doors are having a issue that's not likely the cause. If and when you look at the fuses, visually inspect the ground wires nearby, rusted or corroded connections need to be remedied in any case. Ground G206 is about a foot above the floor and sort of behind the wiring harness and may be hard to see. BTW grounds G202 & G203 are the ones near the floor board and are often a problem in older rust belt vehicles.
Ground G303 is behind the panel at the emergency brake pedal and about a foot above the floor.
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From: Ocean Springs MS
Here is a shot in the dark.
You mentioned that this problem appeared after you had trans replaced and vehicle fully loaded. Crawl underneath and make sure the transmission people tightened the cross member bolts that tie the left frame rail to the right frame rail. If they are loose or not fully tighten the trucks frame may be flexing. If they are tight, around 90 ft-lbs or so you are likely ok. If they are not tight, drive to level ground with the truck unloaded and tighten, tight! Report back if these are found to be not fully tighten and I am sure someone can provide us with the actual required torque value.
You mentioned that this problem appeared after you had trans replaced and vehicle fully loaded. Crawl underneath and make sure the transmission people tightened the cross member bolts that tie the left frame rail to the right frame rail. If they are loose or not fully tighten the trucks frame may be flexing. If they are tight, around 90 ft-lbs or so you are likely ok. If they are not tight, drive to level ground with the truck unloaded and tighten, tight! Report back if these are found to be not fully tighten and I am sure someone can provide us with the actual required torque value.
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I did check out the fuses and all were fine. Upon further troubleshooting I found that when the headlights are on, the door ajar switches all work. Only odd thing was the instrument panel back light where the odometer is, is flickering? Have yet to verify grounds mentioned earlier. Thought this new find might help in the diagnostic. Thanks once again for your continued ideas on a fix.
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Follow up : Still looking into grounds. Cross member bolts were all tight. Visual inspection of exterior grounds not looking good ( since I'm from OH). Going to take all off clean and put ford dielectric grease on all exterior/firewall grounds. Also obtained heavy stranded # 6 and #10 coated ground wire. May place some of old with new ones.
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From: Ocean Springs MS
So, near the PCM on the firewall are four grounds
1. G103 (near fender) is for PCM and other very important sensors/devices (to name some, MAF, cam position, MAF temperature, etc)
2. G102 (between G103 and PCM) for PCM body ground and a data link connector
3. G101 (partially behind PCM on the firewall) bonds (connects) Negative side of battery to firewall
4. Engine ground (2" to the right of PCM)
G102 is listed as data link connector and may (IDK) be the cause of U1950
1. G103 (near fender) is for PCM and other very important sensors/devices (to name some, MAF, cam position, MAF temperature, etc)
2. G102 (between G103 and PCM) for PCM body ground and a data link connector
3. G101 (partially behind PCM on the firewall) bonds (connects) Negative side of battery to firewall
4. Engine ground (2" to the right of PCM)
G102 is listed as data link connector and may (IDK) be the cause of U1950
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Just a follow up. Cleaned up 3 grounds, replaced one and added one. All were on the firewall. Replaced one from firewall to motor and added one from negative post to one behind ECU. Everything appears to be back to normal. Thanks Jimboy for pointing me in the right direction.
5 Year Member
Joined: Dec 2018
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From: Ocean Springs MS
BLD056,Many, many of the posts in this forum (and others) are open ended. Problem stated, solutions suggested but no closure. Thank you for posting feedback that allows future readers to understand and consider your experience with the issue.
jimboy
jimboy
