Foglights as DRL (auto on)

All other modules found in Ford cars
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sanndo
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Joined: 09 Feb 2020, 14:21

Foglights as DRL (auto on)

Post by sanndo » 10 Mar 2020, 17:07

Did anyone find a way how to autostart foglights to work as DRLs?
Without relay or hardware.

tasicky
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Joined: 16 Aug 2019, 09:30

Re: Foglights as DRL (auto on)

Post by tasicky » 11 Mar 2020, 18:42

Its not possible without modification in BCM firmware.

amplified
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Re: Foglights as DRL (auto on)

Post by amplified » 11 Mar 2020, 21:32

anybody sniffed on CAN signal when button for fogs is on?

tasicky
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Joined: 16 Aug 2019, 09:30

Re: Foglights as DRL (auto on)

Post by tasicky » 12 Mar 2020, 18:49

Light switch module is connected to bcm via LIN bus. Fog light are connected directly to BCM. All logic and relay functions are closed in bcm. I think than on mscan you can find only status of this light.

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Stevebe
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Re: Foglights as DRL (auto on)

Post by Stevebe » 27 Mar 2020, 19:29

amplified wrote:
11 Mar 2020, 21:32
anybody sniffed on CAN signal when button for fogs is on?
i have a capture of the LIN bus from the switch if its of any help
Digimod

Go4IT
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Re: Foglights as DRL (auto on)

Post by Go4IT » 22 May 2020, 06:43

tasicky wrote:
12 Mar 2020, 18:49
I think than on mscan you can find only status of this light.
Correct, like for many other signals also. As the foglights are also directly connected to the BCM, all logic is inside this module. The only chance i see to control it via CAN from outside the BCM is to use service control routines of diagnostic services. I don't know how but i am absolutely shure that there exists service calls to get every input signal status and set every output status. BUT - establishing a diagnostic session while driving is maybe a BAD idea :D

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uscovu
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Re: Foglights as DRL (auto on)

Post by uscovu » 02 Jul 2020, 09:42

Hi,

I think you can do it with a relay... It is more simple.

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