[Mark in Idaho]

The relay can be found at many autopart stores. To remove the old relay, remove the 4 nuts holding the whole plastic shifter housing in place and lift it up about an inch. You will need a right angle tool like an allen wrench to depress the tab from under the housing. It takes quite a bit of force to get it to release. An inspection mirror will help you identify the place to depress.

The solenoid needs to be ordered from Isuzu withe the white plastic assembly. Avoid ordering it from a Honda dealer. They sell it with too many parts connected.

I get my Isuzu Rodeo parts from McCurley Isuzu in Pasco Washington. Gary Neibel is very helpful. He can ship everywhere and stocks the solenoid.

Expect to pay about $70 including shipping. The local Honda parts counter quoted me $140. fyi, Honda sold the Rodeo as the Honda Passport.

In some cases, the microswitch is malfunctioning. It can get jambed out of position. I cut a small piece of aluminum can to extend the lever so it makes better contact with the shifter. I use a 3/8 x 1/4 inch piece of aluminum rolled into a half round. I glue it to the end of the lever of the microswitch with either epoxy or super glue. Be careful. The microswitch is held on with very fragile plastic tabs. Do not try to remove it.

While you have this all apart, it may be a good time to replace the shift indicator light bulb with a fresh one. For just $2.00, it can give you more life before needing to take everything apart just to replace a bulb. The blue rubber cover peals off and can be installed on the new bulb.