Chrysler Repair: 01 Concorde: no starter motor action, solenoid switch, side pins


Question
we changed the waterpump on my car first of all.after we put it back together there is no power to the key .There is power to everything else like the horn,lights etc. but not to the key.the car will start if we bypass the key from the starter to the battery. We changed the fuses in the power control box.Someone told us that it is the neutral swith which by the way is inside the trany. Sure hope you can help

Answer
Hi Eva,
Begin by checking to see if the starter motor relay clicks when a helper tries the key. It is located in the power distribution box under the hood near the battery. The relay is the 4th counting from the in-board edge of the box. Listen or feel it.
If it clicks then try substituting it with another relay that has the same part number to test the relay's internal points aren't oxidized. If that doesn't change things then check at the starter motor's solenoid switch to be sure that 12V arrives on the light green wire when the key is used, or remove the starter relay and jump a wire between the two side by side pins in the relay's socket which should cause the starter to come to life but besure you are in start or neutral with the shifter when you do the jump).  If it does (or you don't action with the jump), then the solenoid at the motor is bad or the main power from the battery to the stater is not getting there on the fat red wire.
If the relay doesn't click, then try to substitute another relay to see if that one clicks which would say that the actuation coil of the starter relay is bad.
If the substitute relay doesn't click, then check fuse G in the box. If that is good then remove the relay and see if when you try the key there is 12v on the in-board rear pin of the relay socket (to test the ignition switch contacts) and  also see if the front in-board pin reads a short to ground when you try the key (if it doesn't read a short to ground then try moving the gear shift lever a little off the detent position in either park or neutral to test if the park/neutral safety switch may be out of adjustment so that the circuit to energize the starter relay won't close). The effect of the switch when it works is to ground the front in-board pin, so if that in fact does not happen the switch is out of adjustment or the wire from it to the pcm which actually does the grounding is 'open'.
Those are the basics of the starter motor's circuit. Let me know what you find or if there is any confusion.
Roland