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x2 ... did extensive chassis ground stud and wire terminal cleaning ( the three spot welded ground studs under the batt tray with all associated wires ),did the $10,000,000 ramsey pos lead jumper wire fix to the relay block power feed, cleaned the engine ground strap on front valve cover, cleaned terminals on batt, pretty much have cleaned and inspected every ground and feed (off batt) i can see, no luck. Did some voltage checking on the ticking relay, shows 7.2 v approx at the feed post, i dont think the relay itself is at fault, i still believe theres a ground issue somewhere that wouls cause body control module issues tho my scanner is giving multiple,but inconsistant dtc's, anywhere between 2 to upwards of 94 codes. Clearing these has no effect on symptons at all and the codes return in some fashion or another immediatly leading me to believe they are all erroneous . If anyone has identified the route cause of the above quoted symptoms id say he/she is in for a medal or at least to be lumped into a similar catagory as ranzy

 

Late reply, but what I ended up doing:

At one of the ground studs (G103), there is a ring terminal that has about 7 wires in it. That terminal was corroded so none of those wires were getting ground. G103 is one of the 3 ground points under the battery holder. It is the lowest one and the one closest to the front of the vehicle.

To check, you need a multimeter. Remove the ring terminal from the ground post. Set your meter to ohms. Touch one end of the probe to the ring terminal, and the other end to the negative post on the battery. You should get 0.1 or so. If you get a HIGH NUMBER or INFINITY (sometimes shown as 1), then it's not a good connection. You will have to re-cut, strip, crimp, and then connect all the wires in new ring terminals and re-connect to the ground lug.

For those of you who want to do a step by step check starting at the IPM and who have some general electrical knowledge. This is a good video:
These are the ground points in the IPM I had to check:
c1 black/dark green pin 6
c7 black/orange pin 8
c5 black/yellow pin 14
c4 grey/black pin 12

c5 black/yellow pin 8 bad ground ... which connected to G103.

 

Thanks Shutout,

I was just working an '04 with the "classic symptoms". I went first with the power lead "bypass" to the IPM but no luck. I too found that the 7 wire bundle that attaches to the forward-most, lowest ground stud under the battery tray had extensive corrosion and most if none of the 7 wires had good connectivity. I pulled (easily) the OEM connector and re-stripped and crimped the wires to new connectors - I did one with 4 wires and one with 3. There is not much room to work and not much slack in the wires but enough to get the job done. Worked like a champ.

Thanks for the lead

 

Glad I posted and glad it helped.

One other thing I noticed was that even after all this my driver side headlight would not work (even with a good bulb). F or whatever reason the ground for the headlight is clumped in another ring terminal of about 8 wires. This terminal is 2 posts away from the other one, maybe 6 inches away. Same issue with corrosion.

 

Interesting you mention that. The Vehicle in question had an "added ground" behind the left headlight that was/is "sistered" into the OEM ground and to a sheet metal screw added into the sheet metal behind the headlight.

I used a "piercing probe tester" to probe each of the wires in the bundle you address. All had solid ground so for now I let it alone. But I'll start there next time if necessary.

Thanks

 

Are you able to possibly send me these pics? I'm not able to view them for some reason. Thank you very much

 

2004 Pacifica

Still have the flickering after the Ranzy fix but it does seem to simmer down sooner. At startup the random light show begins immediately but it does stop after about a minute. So we will try with another cable from the positive terminal to the fuse box.

QUESTION - noticed the disconnected wire in proximity of fuse box and wondering if it was already disconnected (I think so) but am wondering if anyone can identify the wire and if it should be reconnected and how to determine, if so, which is positive and negative in the plastic connector.

Two pictures attached.

 

Looking at your first pic and compared it to our '04 Pac we don't have nearly that many wires in a loom and the one we have looks like it goes into the firewall and maybe to the wiper motors. Someone else should be able to help. *BW*

 

Thank-you. I think it might be to do with remote starter. I connected the wire and the remote now does not work LOL. Will disconnect and see if the remote works.

 

Regarding flickering (Ranzy fix), I detached, cleaned and reattached the ground wires under the battery tray. Did not redo the Ranzy fix which we did first, left the cable that we attached the first time in place. No flickering!