This is my first post. My problem started 4 days ago,when I was leaving for work my 2002 f150 4.6 had a dead battery. I replaced battery and had problem with getting computer reset. After almost two days I came across this sight. I was able to get truck to start with info I found here. This morning my battery was down enough that all it would do is just click when I turned key to start. When I turn key on all my gauges did as if I had reset computer. With ignition off and key removed my heat and air blower still had power. Has anyone experienced this and if so did you find what the problem was? Thanks. Shortyray

 

Your GEM module is bad. Could be from windshield leaking and water getting on it.

Look to replace it or call Ford.

 

Thanks Tackle, I will check it out

 

Remember, you have to replace the GEM with an identical module, or you will have problems. The last letter can be different but the next to last letter and first series of 4 must be the same.

Example:

XL34-14B205-AE the first four letters and digits (XL34) and the A before the E, at the end, should be the same on your replacement. The end letter, used in replacement, might be a A, B, C, D, E, F, etc. The last letter is the update/upgrade or replaced number from Ford. Sometimes, the whole number may change, but in the GEN10 trucks, the GEM's are usually code to code. This is for the sticker on the part not necessarily the part number from Ford. Ford parts would not have the XL34 on their replacement part. It would be most likely a XL3T-14B205-AE replacement or possibly an AF or higher. The number replacement is totally up to Ford parts designation, and may look nothing like the original number, except for the 14B205 will always be the same for a GEM. It's Ford's basic number for that part. The letters around it give model and year of use for most cases.

I did Ford parts for years, so that is why I say it like this. Just trying to help people understand Ford parts numbering a designation. Hope that helps you some.

 

[QUOTE=akdoggie;4054239]Remember, you have to replace the GEM with an identical module, or you will have problems. The last letter can be different but the next to last letter and first series of 4 must be the same.

Example:

XL34-14B205-AE the first four letters and digits (XL34) and the A before the E, at the end, should be the same on your replacement. The end letter, used in replacement, might be a A, B, C, D, E, F, etc. The last letter is the update/upgrade or replaced number from Ford. Sometimes, the whole number may change, but in the GEN10 trucks, the GEM's are usually code to code. This is for the sticker on the part not necessarily the part number from Ford. Ford parts would not have the XL34 on their replacement part. It would be most likely a XL3T-14B205-AE replacement or possibly an AF or higher. The number replacement is totally up to Ford parts designation, and may look nothing like the original number, except for the 14B205 will always be the same for a GEM. It's Ford's basic number for that part. The letters around it give model and year of use for most cases.

I did Ford parts for years, so that is why I say it like this. Just trying to help people understand Ford parts numbering a designation. Hope that helps you some.[/QUOTE
Thank you akdoggy. Mine has YL34-AA There's also a large B at each end of bar code, will the replacement GEM need to be programmed or just swap out? I've found some on eBay with 6 month warranties , thinking of going that route

 

Thanks for the info akdoggie. If I get one with matching letters and # will it be just swap or will it need to be programmed as I've read on other sites?