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Check out the main relay.
If ground side switched then two hot and one ground The fourth is the Switch. Wait, did you say that the fuse was not getting 12 volts? |
Originally Posted by avisitor
(Post 34051)
Check out the main relay.
If ground side switched then two hot and one ground The fourth is the Switch. Wait, did you say that the fuse was not getting 12 volts? |
I forget that Honda has a different type of main relay.
There is actually two relays inside The ignition switch controls the power to turn on the relay to power the ECU And then ECU controls the ground side switching energize the relay to power the fuel pump So you have no power to the ECU or fuse Which is why there is no check engine light which first turning the key to the "ON" position Which tells me that the relay is suspect. The main relay has 8 pins of which pin number 6 is not used Pin 1 is to battery Pin 2 is to ground Pin 3 is to ECU power up Pin 4 is to st. switch Pin 5 is to Ignition switch Pin 6 is not used Pin 7 is to fuel pump Pin 8 is to ECU control fuel pump There are plenty of videos on youtube about the main relay issues. Would do a little more testing before deciding to repair or replace part. Good luck |
Originally Posted by avisitor
(Post 34059)
I forget that Honda has a different type of main relay.
There is actually two relays inside The ignition switch controls the power to turn on the relay to power the ECU And then ECU controls the ground side switching energize the relay to power the fuel pump So you have no power to the ECU or fuse Which is why there is no check engine light which first turning the key to the "ON" position Which tells me that the relay is suspect. The main relay has 8 pins of which pin number 6 is not used Pin 1 is to battery Pin 2 is to ground Pin 3 is to ECU power up Pin 4 is to st. switch Pin 5 is to Ignition switch Pin 6 is not used Pin 7 is to fuel pump Pin 8 is to ECU control fuel pump There are plenty of videos on youtube about the main relay issues. Would do a little more testing before deciding to repair or replace part. Good luck |
Originally Posted by Jmashanic30
(Post 34061)
If I remember right my number 4 pin is the one that isn't used cause I did pull it off to have a look at it. But I'll definitely look further into it just seems weird how it would go bad after I just changed the motor and wanted to do the initial start of said motor when it worked on old motor two days prior.
Think pin 4 can just hang according to the schematic for the main relay. Not sure. But, it should have 12 volts when trying to start engine According to the internet, the main relay has known issues with solder joints cracking However, since connectors were taken off and put back together, I tend to believe some pins might have bent. But, I don't know. Please let us know if you find the problem. |
Originally Posted by avisitor
(Post 34062)
Yeah, it is strange. So this is why I suggest to look deeper into this before changing any parts.
Think pin 4 can just hang according to the schematic for the main relay. Not sure. But, it should have 12 volts when trying to start engine According to the internet, the main relay has known issues with solder joints cracking However, since connectors were taken off and put back together, I tend to believe some pins might have bent. But, I don't know. Please let us know if you find the problem. |
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