What kind of diode to use?

I'm connecting my door handle lights to come on when I remote start.791xv alarm. This is what I did relay:

86 - ground

85 - parking light wire from alarm brain

87 - parking light wire from alarm brain; 85&87 also to parking light wire of truck, with a diode between to keep door handle light from coming on when park lights are turned on at night.

30 - to door handle lights on truck

87a - to door handle light switch

Everything works find.

Until I seen the diode smoking.:-(

Any help is appreciated. Thanks in advance

How much current is the light pulling?

It sounds like your parking lights are pulling more current that what the diode is capable of handling.

Use two relays one for the parking lights and one for the door handles. That way you won't need the diode as the relays will keep the circuits isolated from each other. And will prevent the parking lights from turning on when the door handles light up( I'm assuming that the door handles come on with the dome light) and vise versa.

I did not cut the parking light wires of the truck,I tapped into it.

One wire coming from parking lights with diode (strip toward vehicle parking light wire) to block (+) when park lights are manually turned on. To keep from triggering relay. Want relay to trigger only from park light wire from alarm brain.

Dualsport,I like the two sanerios you gave I'll try one or both when I get a chance.

mo 12v, I had the band to park light vehicle side to block (+), but I guess the diode couldn't handle it.

Thanks for the replies, keep them coming. I'll try anyone of them that seems the best until I get it.

Dualsport, I finally got around to hooking up the relays. I used the two relay diagram you provided. Works like a charm. I chose that one because the running board lights and the door handle lights are running together and I don't know how much current it's pulling.

Thanks again.