Re: 4-Position Light Switch Help

Posted by Bob M on May 15, 2003 at 06:51:29 from (165.170.128.65):

In Reply to: 4-Position Light Switch Help posted by Farmall Don on May 14, 2003 at 14:38:08:

Don - Sounds like you got some sort of "generic" light switch to cover a wide range of IHC equipment. The terminals are as follows:

BAT - supply from ammeter (I highly recommend installing a fuse (15 or 20 amps) in the supply to the BAT terminal.)
HL - headlights
RL - rear light
TL - tail light
INST - instrument lights

Since an M does not have separate tail lights or instrument lights so the TL and INST terminals will not be used.

Is your M equipped with a cutout relay (2 terminals and mounted on/near the generator) or a voltage regulator (4 terminals and mounted away from the generator)? If it has a cutout, from your description your new switch will not provide the charging system control function provided by the old 4-position light switch. Your options then are 1 - ground the generator field terminal so the generator runs at "high charge" all the time, or 2 - replace the cutout with a regulator. #3 - Find a used 4-position switch at a boneyard, in the YT classifieds, Ebay, etc.

Options #2 of #3 are preferred. However if you use your tractor infrequently or only for short periods between starts, you can get by with #1

However your M already has a regulator, simply wire the switch per the table above and you'll be good to go.

Hope this helps….

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