[img]15873042_10155647670859377_2469826905735265522_n.jpg[/img] have a black box with 4 wires 3 to revcounter and one not going anywhere need to wire rev counter to zetec what is the black box ?.blue black and red go to rev counter and yellow is loose
[img]15873042_10155647670859377_2469826905735265522_n[/img]

[Edited on 3/1/17 by legend]

[Edited on 3/1/17 by legend]

[Edited on 3/1/17 by legend]

quote:

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Originally posted by legend



[Edited on 3/1/17 by legend]

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yes

Could be a pulse converter. Was rev gauge intended for a different engine?

engine was a zetec but had different ecu omex i think

That would be my guess too.....are there any markings / company name on the printed circuit board?

Cheers

Ian

quote:

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Originally posted by loggyboy
Could be a pulse converter. Was rev gauge intended for a different engine?

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The big power transistor suggests that it could be a shift light. Two supply wires, one pulse input and one output to shift lamp.