I took out my circa 1980 bilge blower to clean up the wiring and re-install it closer to alternator. There is no sticker on it anymore so i have no idea what the specs are or what blower it is. It looks pretty much identical to the new Jabsco blowers, however...it has a single blue and a single yellow wire coming from the motor. I briefly connected it to a 12 volt battery on the bench and it seems to work perfectly well and identical in power and airflow direction when wired with either wire connected to either the positive or negative terminal. Im going to assume it doesnt matter then which wire goes to either terminal, but want to check first to see if anyone knows whether or not it makes any difference internally to the blower?
Old bilge blower wiring question.
- Thread starter BAD ORCA
- Start date
Thank you good to know. I shall wire it yellow to hot. Unfortunately the wires have been disconnected for some time so i was not able to trace how it was originally connected.
jssailem
SBO Weather and Forecasting Forum Jim & John
- Oct 22, 2014
- 21,344
While true, sometimes there are also Black (neg) plus Red (Pos), Red (pos) plus yellow (neg), and purple plus orange (which happens because the electrical assembler was color-blind and just grabbed whatever was in the bin).
I would think that the fan motor would turn in different directions based on the polarity of the wires. For its intended use, stir up the air in the bilge, I am not sure it really matters. If you want to pump air in or pull air out, then you will need a venting hose for that purpose.