Where do you find an in-series "test" tool for relays to probe each post of the relay while it is installed. The ones I've seen are blue, and you plug it in where the relay goes, then relay plugs into the top of it, leaving the tabs exposed so you can aligator clip onto them. I have a bunch of relays clicking on my durango and it won't run. need to see what is happening.

Thanks

Why test them while installed? Why not just use a multimeter to test them while they're out?

Cuz I'm not testing whether or not they work. More to see what voltages are coming in and going out. and what'* happening when things are going haywire. With no relay - the circuit is open and will test different then when installed.

Come to butthead.
Amazon has the group w/o pliers listed for $120
Information on using the Lisle 56810 Relay Test Jumper Kit, 60610 Relay Test Jumper Kit II, 69200 Test Lead Kit for Relay Test Jumpers and 46950 Relay Puller Pliers.

that doesnt tell you if the connection is bad you would be better of taking the cover off of it and sticking it back in the hole.