RTU 12 volt conversion

[cstrucks]

I have a RTU that I have converted to 12 volt neg ground and a 2 wire delco alternator. I cant get it to shut off. I have soldered the diode in the alternator wire number one but it still wont shut off. What am I missing? I used an 12 volt no resistor needed coil and have the wire coming from switch and the number 1 wire from the alternator on the + side of the coil and the - side going to the distributor

 

[molinegb]

Output for alternator should go back to ammeter/switch otherwise you are " hot wiring".

 

[Rich'sToys]

Is your diode in the right way? If it's in backwards it won't work.

 

[cstrucks]

Output for alternator should go back to ammeter/switch otherwise you are " hot wiring".

Its connected to the ign switch wire at the coil. The Battery wire is going back to the gauge.

 

[cstrucks]

Is your diode in the right way? If it's in backwards it won't work.

I put the white line to the Alt side

 

[wore out]

I put the white line to the Alt side

The diode MAY be shorted, possibly from the heat of soldering IF you made soldered connections at the diode.

What diode did you use, I use 1N5408's, WAY "overkill" for the application, but still CHEAP and readily available.