Civic 91 crank, but no power to dash or ecu

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May 15, 2016 | 06:16 PM

Gobiee

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Civic 91 crank, but no power to dash or ecu

MY civic 91 si wont turn on ecu dashboard or clock is not getting power ? headlights work ecu is good battery is good

May 15, 2016 | 06:29 PM

bbarbulo

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Joined: Sep 2002

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From: CANADO

Re: Civic 91 crank, but no power to dash or ecu

You check the 20 amp fuse in the lower right of the fuse panel?

May 16, 2016 | 07:39 AM

Gobiee

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Joined: May 2016

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Re: Civic 91 crank, but no power to dash or ecu

Yes I have I removed the fuse box to check and make sure my main relay is good all fuses are good too

i get power to everthing else except to the Ecu and my Indicators (CEL,battery,low oil, or seatbelt )
Radio also works
I needd help i doubled checked all my connection.

Also i dont hear the fuel pump turn on or prime

Last edited by Gobiee; May 16, 2016 at 07:49 PM. Reason: Turn out it my relay wire im able to bypass the main relay but even with the new realy it still wont get power

May 18, 2016 | 09:27 AM

fcm

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Joined: May 2004

Posts: 26,173

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From: kelowna, bc, canada

Re: Civic 91 crank, but no power to dash or ecu

You have a blown/defective fuse or a wiring problem.

How are to testing the fuses?
Best way is with a 12V test light, [not LED type] and test the fuses right in the fuse box, [test both sides] with ign. in both the run position and the start position, if you unplug the exciter, [starter] lead from the starter motor engine will not crank when testing the fuses.

It is important the check the fuses when cranking to start, it will determine if ign. switch is good or not. 94