i can answer one of em... and give you an idea on the others...
the door ajar light and the dome light... try to clean the sensors that are near the hinges... spray the stuff out of them with WD-40... open and close a couple times then and spray some more... SHOULD get rid of the problem..
as for the slow crank... might have a bad alternator?
as for the radiator.. i wouldnt go for the fix in can... find the hole first... if its a hose... replace the hose... i forgot where exactly the cap is.
ive got an 02 ranger edge 3.0 v6 auto.. ive been there and done it my friend... im currently replacin the u joints on it now... your stuff is cake compared to my pile! lol
what guy doesnt love a girl that smells like WD-40?! lol
2002 Ford Ranger EDGE, Reg Cab, 3.0L V6. no mods yet
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