Quote:
Originally posted by Early_S_Man
You can always operate a relay from either a ground or power signal ... but the lamp or LED in an illuminated switch almost always requires a switched power signal to correctly display the state of the operated device!
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Learned this by trial and error. Just added a Radio Shack LED rocker switch to the front oil cooler fan. Tried to wire it on the ground side of the relay (pin #85 to ground)...could get the fan to come on, but not the LED. Rewired on the power side of the cirucit and all is well. Even with the switch added, the fan remains fuse protected (pulled fuse and nada).
Switch
Connections:
"Line" - to fan relay pin #30 (common-hot)
"Load" - to fan pos lead (via snap-on wire splice)
"Ground" - to ground (chassis)
From right to left: Line, Load & Ground (extra pigtail connectors from test wiring on initial ground wiring plan trying to get LED to work)
