Jeep - what is that thing under the hood?

[Moonliner]

I called in the heavy artillery. We should have our answer shortly....


Or even faster....

Originally Posted by Guy that knows ****

That's the ECU - the "Engine Control Unit". The unit converts the distributor's magnetic signal to the necessary signal to fire the coil. If it fails the jeep will not run. You can get a replacement at any major parts store by asking for the ignition control module. If you hook up an HEI (High Energy Ignition) system you will not need it at all and can get rid of it and all the associated wiring (aside from the main igition feed wire that will need to be hooked up to the HEI distributor).

[Moonliner]

Woops. I think this might be the better answer...

You talking about the ones attached to the silver ECU or the one that is by itself on the painted surface? Because that one (on the painted surface) is just a fog light or some such thing relay. Aftermarket it looks. Wouldn't surprise me if the device it was attached to is now long gone.