Trying to find whats wrong with my old Fem

[Fredrik73]

86BEEC8A-2608-464D-A738-B417DA0DE277.jpegE2BBA87E-3D4D-42FA-914B-BC50D13CD2B5.jpeg

[Fredrik73]

Hope this tells alot

[Fredrik73]

I screwed up. It is drivers Kick panel.

I make mistakes and catch most of them but not all.
I am a very bad typist. The other mistakes must be due to dyslexia.
Hermann

P.S. If there is a TO3 version of a P Channel MOSFET, I would be tempted to use that instead of the TO220 OEM version since we can get an external heat sink made for a TO3 MOSFET.
Wait for the next edit.
Something like this. Still looking.
Will post a picture of a T03 transistor next.

Drilled for TO3 pachage.
https://www.newark.com/abl-heatsinks...rmalManagement

For illustration only. 8 amps not enough.
https://www.toyboxtech.com/nte-elect...ge-200v-8-amp/
Watch for edits.
Still looking for the ideal combo.

Only 1 inch high. This heatsink. Drill your own holes.
https://www.newark.com/wakefield-sol...sink/dp/58F540

B217AEDA-ED36-4EDE-94C4-922176A6A338.jpeg

[007Cruiser]

So Fredrik, did you do any actual work today at work? I also have a problem with my old fem but divorce is expensive.

[Fredrik73]

I screwed up. It is drivers Kick panel.

I make mistakes and catch most of them but not all.
I am a very bad typist. The other mistakes must be due to dyslexia.
Hermann

P.S. If there is a TO3 version of a P Channel MOSFET, I would be tempted to use that instead of the TO220 OEM version since we can get an external heat sink made for a TO3 MOSFET.
Wait for the next edit.
Something like this. Still looking.
Will post a picture of a T03 transistor next.

Drilled for TO3 pachage.
https://www.newark.com/abl-heatsinks...rmalManagement

For illustration only. 8 amps not enough.
https://www.toyboxtech.com/nte-elect...ge-200v-8-amp/
Watch for edits.
Still looking for the ideal combo.

Only 1 inch high. This heatsink. Drill your own holes.
https://www.newark.com/wakefield-sol...sink/dp/58F540

That looks nice, i can nothing about mosfets So i cant help right now i Will Ask for help at work tomorrow, it must be perfect to have a cooler like that and mounted outside the box

[Fredrik73]

That relay is not on OMRON's running list of discontinued products; prob worth a phone call or email (I realize you are overseas):

https://www.components.omron.com/sal...ice#tabs-relay

There is also a "Tech Support" form on their "Contact Us" web page...to solicit help.

The OMRON numbers on that relay don't match their typical numbering scheme; it may be something done specifically for FORD with a unique designation; so you should be prepared to describe its configuration in any message to tech support so they may provide an alternative.

Thank you Frank i Will try to get information from omron hoping they can help

[Fredrik73]

So Fredrik, did you do any actual work today at work? I also have a problem with my old fem but divorce is expensive.

Hihi yes Gene i did some work too (but Quick)

[Fredrik73]

So Fredrik, did you do any actual work today at work? I also have a problem with my old fem but divorce is expensive.

Divorce from old FEM or Wife?
i have went thrue two wife divorces and now one FEM divorce (I miss my old FEM) hihihi

[HKS]

B217AEDA-ED36-4EDE-94C4-922176A6A338.jpeg

IC 18 could be a regulator that supplies other than 12 volts.
Did you apply power to the module and measure the voltages on IC18?
That is the only way I know how to find out if it is a regulator IC. I assume all the integrated circuits (RAM, ROM memory and CPU) require +5 (or heaven forbid +3) volts, and it has to come from one of the chassis mounted power ICs.

IC18 must be the +5V regulator, and I think it is located in the corner of the FEM frame (thermally half way in between power steering Q35 and instrument panel lighting Q36) and that would make sense as all 3 are power hogs and heat generators (equally spaced apart as far as possible, one in each corner).

All other power TO220 devices are labeled Q (meaning transistor).
The IC18 (TO220 +5 Volt regulator) replacements are easy to find and are a dime a dozen.

P.S. Welcome to Reverse Engineering.
HKS

[HKS]

86BEEC8A-2608-464D-A738-B417DA0DE277.jpegE2BBA87E-3D4D-42FA-914B-BC50D13CD2B5.jpeg

That is some high class Swedish Engineering.

So you found out for sure that Q35 and Q36 are P Channel Metal Oxide Silicon Field Effect Transistors.
Hermann

[Fredrik73]

That is some high class Swedish Engineering.

So you found out for sure that Q35 and Q36 are P Channel Metal Oxide Silicon Field effect Transistors.
Hermann

Hermann im not that smart that it looks i need alot of help with this and im working at the right place to borrow nice tools my new jobb is test Engineere at R&D on garage doors so i get alot of tips from my colegues but most help here on TBN
i heard a funny storry today at work, weordered a garage door from our own company and one from USA the same day, we got the door from USA first so boat over the great sea is much faster then flights inside europe hihihi

[Fredrik73]

IC 18 could be a regulator that supplies other than 12 volts.
Did you apply power to the module and measure the voltages on IC18?
That is the only way I know how to find out if it is a regulator IC. I assume all the integrated circuits (RAM, ROM memory and CPU) require +5 (or heaven forbid +3) volts, and it has to come from one of the chassis mounted power ICs.

IC18 must be the +5V regulator, and I think it is located in the corner of the FEM frame (thermally half way in between power steering Q35 and instrument panel lighting Q36) and that would make sense as all 3 are power hogs and heat generators (equally spaced apart as far as possible, one in each corner).

All other power TO220 devices are labeled Q (meaning transistor).
The IC18 (TO220 +5 Volt regulator) replacements are easy to find and are a dime a dozen.

P.S. Welcome to Reverse Engineering.
HKS

i did not measure it now and I dont think i measured it Before when we started this a while ago.
but i Will sold all i have cutted and measure the voltage (think i must find and put back the relays that i broke first to get right measurement)

hihi reverse Engineering is hard thank you for helping me
/Fredrik

[Fredrik73]

That is some high class Swedish Engineering.

So you found out for sure that Q35 and Q36 are P Channel Metal Oxide Silicon Field effect Transistors.
Hermann

Hermann
do you know any other what they are for?
like
Q35: power steering
Q36: instrument panel lighting
I try to Save so much info i can on the Fem
or info about Any other component In the fem

[HKS]

i did not measure it now and I dont think i measured it Before when we started this a while ago.
but i Will sold all i have cutted and measure the voltage (think i must find and put back the relays that i broke first to get right measurement)

hihi reverse Engineering is hard thank you for helping me
/Fredrik

Fredrick,
The IC18 regulator does not need to see much of a load (relay) to regulate to +5 volts.
Yes, you need to hook it up again to see if it is +5 or +3 volts.
Or, you could test IC18 externally. You just need a +12 v source or a battery. I will look for a drawing showing which pins are +12 input and which pin is the +5 volt output.
If the center pin is ground, that would verify it being a voltage regulator. Measure (Ohmmeter) the center pin to chassis. It should read close to 00.

TO220Regs-l1000.jpgTO220-as-l1600.jpg


P.S. I will try to ID some more of the MOSFET power switches.

I or you need to measure to the center pins of the remaining MOSFETs from a suspect connector pin. Select a pin on a plug (like L Headlamp) and check all the MOSFET center pins looking for continuity (short).

One can easily find all the pins from the schematics. This process of elimination requires only the pins relating to each circuit. Not every pin in each plug/socket.

[HKS]

[QUOTE=HKS;n1082946]

Fredrick,
The IC18 regulator does not need to see much of a load to regulate to +5 volts.
Yes, you need to hook it up again to see if it is +5 or +3 volts.
Or, you could test IC18 externally. You just need a +12 v source or a battery. I will look for a drawing showing which pins are +12 input and which pin is the +5 volt output.
If the center pin is ground, that would verify it being a voltage regulator. Measure (Ohmmeter) the center pin to chassis. It should read close to 00.

TO220Regs-l1000.jpgTO220-as-l1600.jpg


P.S. I will try to ID some more of the MOSFET power switches.

I or you need to measure to the center pins of the remaining MOSFETs from a suspect connector pin. Select a pin on a plug (like L Headlamp) and check all the MOSFET center pins looking for continuity (short).

One can easily find all the pins from the schematics. This process of elimination requires only the pins relating to each circuit. Not every pin in each plug/socket.[/QUOTE
Look at the 2002 Service manual Wiring Diagrams.
Page 87-1 shows 4 switches in the Front Electronic Module. The switches are MOSFETS. Connector C201a pins 10,7,17 and 3.

Page 92-2 shows 6 switches. Assigned to several Different connectors.

That makes 10 switches.
My eyes may be tired. So double check this.

P.S. I only count 10 MOSFETS in my new spare 2018 FEM. So two of the switches must be relays. I see 2 relays in place of the one you show pictured. The original FEM may have had a couple more MOSFETS.
I don't feel like tearing out my old working module soon. The neighbors would hear a lot of Navy cuss words, lasting several hours.
Pix of my old module is the bottom one.
FEM2018.jpg

1W6T-13B525-AJ.jpg
Top shows 10 fingers. One empty and another IC18 leaving 8.
Left bottom 2 are Mosfets others empty.