Re: Diode Warning Light

Posted by John T on February 16, 2007 at 13:23:03 from (66.244.90.5):

In Reply to: Diode Warning Light posted by SuperA-Tx on February 16, 2007 at 12:24:12:

TX, If youre needing the diode thats wired in series between the ignition switch or coil and the lil side No. 1 (R) terminal on the Delco 10 SI alternator to serve as excitation and prevent backfeed run on when the ignition is turned off,,,,,,,,,I prefer a 10 ohm 5 watt current limiting protection resistor myself instead of any diode. Then in the rare event she still runs with the ignition off, a diode can be added and its size isnt all that critical, it needs to have a voltage withstand rating of at least 50 or more volts and 1 to 5 amps or larger should suffice, I use 5 just cuz the leads are bigger n more sturdy.

Or a diode will work also if thats what you want.

Now a "Warning Light" is a different animal, its NOT a diode unless its some sort of LED, its a Light Bulb (an idiot light) which glows if shes not charging but goes off if she is and it can still serve as the same function of exciting the alternator and providing current limiting protection. It wires the same again between the ignition switch or coil and the alternators lil side No 1 (R) terminal.

Use a resistor (my choice) or a diode or an idiot light, your tractor your call.

John T

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