wiring checking engine light to Haltech ecu
#1
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wiring checking engine light to Haltech ecu
i'm looking to wire the Haltech CEL output to the stock CEL on the cluster. has anyone done this before? i would think the CEL would trace back to the stock ecu harness? but i couldn't find anything on the ecu pinout. is the only option is run wire directly from ecu to the back of the cluster CEL?
#3
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The following 4 users liked this post by trackjunkie:
#6
I too am trying to do this.
Myself, im having trouble as I am wiring a series 8 and my OEM diagrams are all in Japanese.
( I am running a haltech )
Could you tell me please if you are earthing this orange black wire to activate the light? ( I believe that is what the haltech will do to if I assign a wire to do so )
the series 8 wiring is fairly different.
the factory ecu plug has an assigned pin for engine faults, just it is a 1v signal. ( I think this is what the power fc will send ) but that will only help people with that ecu maybe.
Pin 4AI. see snip of diagram.
Your method obviously skips all the associated wiring in between, ( the hidden and hard to get to ecu )
I do not think the earlier fds had such a pin.
I have also read on this forum that s8s have no engine check light...
any help would be appreciated,
Myself, im having trouble as I am wiring a series 8 and my OEM diagrams are all in Japanese.
( I am running a haltech )
Could you tell me please if you are earthing this orange black wire to activate the light? ( I believe that is what the haltech will do to if I assign a wire to do so )
the series 8 wiring is fairly different.
the factory ecu plug has an assigned pin for engine faults, just it is a 1v signal. ( I think this is what the power fc will send ) but that will only help people with that ecu maybe.
Pin 4AI. see snip of diagram.
Your method obviously skips all the associated wiring in between, ( the hidden and hard to get to ecu )
I do not think the earlier fds had such a pin.
I have also read on this forum that s8s have no engine check light...
any help would be appreciated,
#7
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the US FD's have a couple extra parts, the BAC valve, EGR, and the check engine light, so they run out of available pins. they then add a little magic box, the E/L unit, and run the Headlight switch, Blower Switch, Defroster switch, and CEL to this E/L unit, and that frees up a bunch of inputs on the ecu for the add ons.
by the time they get to S8 all of that malarkey is gone. i'm under the impression that S8 has a Check engine light, although ive never seen it.
my notes show that FEN = Fault ENable, on the US cars that sends the code number to the E/L unit which then can drive a bulb
by the time they get to S8 all of that malarkey is gone. i'm under the impression that S8 has a Check engine light, although ive never seen it.
my notes show that FEN = Fault ENable, on the US cars that sends the code number to the E/L unit which then can drive a bulb
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