Glow plug control module or glow plug relay?
Evening all. I need some info as I am unsure what to get. I have a 2000 California Excursion. I need tO know whether it needs a relay or module as I need to smog it and my check engine light is on. The diagnostic says comm failure so I think it is the module. I want to make sure it is that since I went to an auto store and they sold both the module and relay. I am pretty sure it is the module as most people on this site say the exs all had modules and NOT relays. I just want to be sure before I drop $125 on the part. Thanks guys.