Posted by The tractor vet on May 13, 2019 at 09:52:10 from (104.179.81.68):
In Reply to: 7 point plug on 766 posted by Farmall65 on May 12, 2019 at 12:55:22:
Well first off let me say this , the head light switch will be your weak link to start with . The head light system on the older I H tractors have enough problems running the factory lighting and that is four head lights one rear work/tail light and dash lights. The system is maxed out on that alone then everybody added in and extra work light on the back plus the flashers , but normally when the flashers are on you drop the two head lights/ field lights and the work lights and ran two flashers . Myself when i do a change on the system i split the load and remove the fuse and replace with circuit brakers and C V relays upgrade the flasher to a solid state variable rate . For what your tryen to do myself i would split the system up even more with three breakers and two C V replays . Use the wire coming off the field light side of the switch to energize the two C V relays for work lights and the seven way plug for rear lighting and flashers with a positive ground thru the plug along with what ever else needed . I would pull power for the CV relays from the hot post on the starter to the breakers then to the relay and power to the headlight switch from the old hot wire to the org. fuse to the first breaker then to the head light switch . This set up would take me about four hours to do . Your wire size from the hot post on the started to the breakers should be 10 ga. to 25-30 amp breakers the headlight breaker should be no larger the 25 amp. Wire to S A E code and use the correct colors in wire, as it makes for easier tracing , flashers are your yellow and green tail/ markers are brown and black hot wire red and ground is white.. USe no less then a 12 ga. ground , myself i go with 10 ga.
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