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Master & Ground Solenoid
I am having some small electrical problems which I think may be due to excessive resistance in electrical lines to the landing gear electrical motor, probably in the master solenoid. Many of you recall that GMAs, among others, recommends that the solenoid be changed every 3-5 years. My problem is this: when I go to get the part number, there seems to be`two, one for the battery and one for the ground. Now Í am clueless. I know that there is one for each engine starter, and then there is the master or battery solenoid mounted on the firewall near the other two, so what is this other one, a ground solenoid or contactor? What does it do? Can anyone help? The P/N I have for the battery solenoid (which I think is the master solenoid) is S1580-1 and the ground solenoid is S1577-1. Should I change both?
Ernie
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