Quick Diode Question.

[*89Laredo*]

Would a 1N4001 Diode be fine where a 1N4002 diode is recommended? It only is going to see 12V, I dont know how many amps. Im kinda new to diodes.

I am doing the 2nd gear lockout, and it says "1N4002 diode or something like it": http://www.fourwheeler.com/techarti...4_jeep_cherokees_transmission_lock/index.html

I used it to run a high rpm 100MM fan and it didnt blow up, I figure it would be fine but I should pry ask.

 

[RCP Phx]

The only difference is the voltage rating.
http://www.diodes.com/datasheets/ds28002.pdf

 

[kastein]

For automotive stuff? Yeah go for it. The 1N4001 to 1N4007 family only differs in PIV (Peak Inverse Voltage) so you should be fine.

Not sure I'd use the 1N400x family diodes for a transmission solenoid project since those solenoids are supposed to be 11-15 ohm loads which at 14-15 volts would be as much as 1.36 amps, and those diodes are only rated for 1 amp forward current. I would suggest something like the 1N540x series instead as they are rated at 3 amps forward current; Radio Shack sells a pack of 4 1N5402s or 1N5404s for a few bucks. They should be in the parts assortment bins about halfway up one column.

EDIT: what year is your XJ? That mod will work with some changes on a 97-up but your check engine light will come on unless you use a kit designed to keep this from happening. Montana Fab is the only company on the market with such a kit as far as I know.

 

[*89Laredo*]

Its a 89, no such thing as a "check engine light" lol
Im going to town, Ill try to find some 1n540x diodes. I need to pick up some switches and wire anyway.

 

[kastein]

Just a heads up - you won't find 1N540x. X in this case I meant to indicate that a few different numbers could go there without it affecting your results, you can use 1N5401, 1N5402, and 1N5404 diodes equally in this application. I'm pretty sure radio shack sells all of them so just pick whichever they have in stock / is cheapest.

 

[*89Laredo*]

I knew that..
Ill check radioshack.

 

[*89Laredo*]

Got a 2 pack of 1N5400 Diodes and two switches. Ill pry do the mod tomorrow if I have the time.

 

[*89Laredo*]

Does this look right? Im gonna do it some time tomorrow.

 

[kastein]

You'll need to put the switch for 1st gear in between the junction of the diode and 2nd gear switches and take out the wire there... like this:

Otherwise, the black wire you had from the diode to the splice leading to the solenoid and 2nd gear lock-in switch would keep your 1st gear lock-in switch from doing anything.

 

[*89Laredo*]

thanks