This is the best way I have found of checking power and grounds. You can have a bad wire or with pinhole in the insulation and have a couple of good strands of wire left and pass an ohm test but it wont allow enough current to power the light.
I read that tip on IATN network which is a site for techs all over the world , Makes for a low budget way to check using a high amperage load to check wire integrity.
Here is a post from IATN on a Chrysler charging problem
.. & was going to suggest high resistance/ bad connection my self.. If all of that checks out ? there are some posts in the arcives that tell you how to wire in an old style voltage regulator, so you don't have to spend the $$ for a new computer.. Would hate to hear you replaced the computer & the problem was NOT Fixed !! But it happens all the time ;>{ That is where checking the wire/connectors resistance IS Important !! & some of the ground locations are in redicolus spots on these Dodges... IF you have a pinout of the PCM {?} then you could unplug the PCM connector & using a SEPERATE battery attach the + wire to the DISCONNECTED ground OF THE VEHICLE BATTERY & plug in a headlight bulb { High or low beam NOT Both } to the sense wire of the Disconnected PCM connector & ground the headlight back to the Seperate battery.. IF the headlight bulb lights Brightly {?} then you have proven the ground side of this circuit is capable of flowing 10 amps & the connections are tight.. The same Can be done on the positive side of the circuit, but EVERYTHING ELSE MUST BE DISCONNECTED !! There Is NO Check in the mail !! Be CAREFULL !! Hope this Helps ;>? K.P.
