Quote:
Originally Posted by Arthur Dalton
Ok
So, we have a good circuit until we get to the N16 module . This is Base Module . It is over by the other modules on the passenger side firewall, engine compartment. It has 4 fuses ..check each one.
Also, I suspect a possible ground problem and that is why I asked for engine ground, but you keep using the #1 of 38 pin..I don't want you to do that..my test are very SPECIFIC and have logic that you don't understand, so please follow them as I write them..read them twice if you must.
So, check the modules fuses and also check those Brown ground wires on the chassis.
Also, go back to the post where I listed the criteria for AIR . You will not get a pump until those are met and that info is transferred to the BM. The BM is powered by fuse 6 and the modules internal circuits are protected by those 4 10A fuses, so they need to be checked next.
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Hi Arthur,
Today was a 13 hour workday - setting up for the car show, so I didn't get a chance to get to the car until late tonight.
BM: I had previously checked these 4 fuses, but went back again and check VERY carefully. All 4 are good.
Ground wires: On the understanding you are referring to the 3 separate screws at which a total of 8 grounds are found - all near the module box - 2 of the screws into the upper strut support and 1 into the module box itself.....I removed all 3 screws - cleaned all connections and screw threads - sanded surface oxidation for contact areas - reinstalled. Also - inspected all wires - no breakage or other damage found.
On the understanding that there might of been a grounding problem, I tested voltage before and after.
BEFORE inspecting/cleaning - key on / engine on:
1. Pin 86 to ground screws = 12 volts
2. Pin 86 to pin 85 = 12 volts
In light of #1 and #2 above - I reinstalled relay: clutch did NOT come on.
AFTER the relay re-installation test:
1. Pin 86 to ground screws = 12 volts
2. Pin 86 to pin 85 = 5 volts
I THEN did the ground screw inspection/cleaning = same results, i.e.
1. Pin 86 to ground screws = 12 volts
2. Pin 86 to pin 85 = 5 volts
This is the data and results of what you requested I check.
BUT - just to be sure that in the interim I've not screwed anything up with the load circuit....I put in the old relay (still cover-less) - manually closed the contact = clutch engaged. I recite this just so you know that the pump itself, and the circuit from the relay to the pump - is ok.
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The fact that sometimes 86/85 is 12 volts - but at other times is 5 volts - and yet the results (no clutch) are the same = puzzles me.
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As to you statement about criteria for AIR. I will re-read. Let me say I do comprehend generally (in other words - I know the pump does not run all the time) but I do not comprehend all of the specifics of the criteria. And...I would like to understand this. So I might ask you to explain this to me again, but I first re-read, and then try to learn it on my own before I ask you to take the time to re-explain.
So anyway - please know I sincerely appreciate your help, your time and your advice with this issue.
I hope all is going well for you.
Jim