Any ideas

[XMP]

I replaced a perfectly operating Minn Kota Edge 70 with a 4 year old Minn Kota Fortrex 80. Plugged it up turned the switch to constant and nothing happened, flipped the switch to momentary, hit the button on the foot control and nothing happened. Checked power at the battery side of the control board and it has 25.9 volts, checked motor side of control board in both constant and momentary and have 0 volts. I didn't hear any click. Does this confirm the control board is bad? The motor was supposed to be a good operating motor that was taken off to upgrade to an ultrex. What do you all think?

[CatFan]

What do you read on the battery side with the switch in constant?

[XMP]

25.9 volts on battery side

0 volts on motor side

[Bradrodfish]

25.9 volts on battery side

0 volts on motor side

Are you reading on the plug or the board? Are you sure the polarity is correct on the plug? The board will not work if the polarity is not correct. If those 2 check out and the relay does not click you could have a bad board. Need to make a couple of more checks. Apply 24 volts to the motor wires to see if it runs. If it runs then the board is bad. If it does not run then the motor has issues.
On the 0 volts on the board output. You will not read voltage with a meter on the board output, even if it is working.The board produces what is called pulse with modulation voltage. It can not be read with a meter.

[XMP]

Thanks, as soon as it warms up I'll check it out.

[Dirt Ball]

I’m not familiar with this particular trolling motor, but does it have an on/off switch?

[XMP]

OK, I checked power at the battery side of the control and it was 25.8 volts with the switch set on continuous.
I then connected the power leads directly to the motor wires bypassing the control board and the motor ran just fine. Does this indicate the control board is bad?

[Jonestrollingmotor]

OK, I checked power at the battery side of the control and it was 25.8 volts with the switch set on continuous.
I then connected the power leads directly to the motor wires bypassing the control board and the motor ran just fine. Does this indicate the control board is bad?

Yes, this indicates bad control board. We keep them in stock if you want to order.
john