FCM Problem ::FIXED::

[Richard L]

1) Can you check the wiring order of the blue harness. Red is the first one (nearest to the gauge harness).

2) Can you check the voltage of the thin red wire under the pump relay. It should read 12V regardless if the TST is used.

[fplucid]

Harness is ok - order is same as for other cables.

As for voltage - thick red, thin red and blue have positive voltage always (in tst mode and in normal) - can't tell what voltage is there exactly, will test with tester today. But, if I give 12V to red and blue cables directly - there is no response. Pump is not working, relay is keeping silent. What can this be? Relay faulty maybe?

One good thing I found out yesterday. With following pins shortened at the same time: "IDC", "PRK", "TST", "INJ" and shortening thick black and red cables on relay water is coming out from thin hose (OUT of FCM). If I shorten "IDC", "PRK", "TST" and black and red cables water is comming only through thick hose, but not through FCM (closed) - is it normal.

[Richard L]

It is good to know both reds have 12V.

The thin blue should be grounded when test jumper is set to TST, provided you n-meet the following conditions:

1) system is powered up
2) gauge button is depressed
3) jumper link is set to IDC
4) jumper link is on TST

The TST is simulating 100% DC, not 100% MPS.

[fplucid]

Finally, I think I figured out what the problem is. The blue wire. It should be grounded for water ingection to start. Currently I see some po wsitive sygnal on it, but if I shorten it to ground everything is working. What can be a reason for this and how to "ground it" when necessary?

[Richard L]

The blue wire goes to ground when the system triggers. No before.

Please check the compartment of the blue wire of the RJ connector is not damaged or slightly bent.

[fplucid]

No. already checked. Even pressed all the pins way down. Checked with the tester female pins on the controller itself - it is always +12, under normal mode and under "TST"
As for wires - red is the first one from the right, blue is the 6th - is this correct?

[Richard L]

Yes correct.

Anyway, Make sure the jumper is on IDC. The HFS-6 can only be manually triggered on the IDC mode.

[fplucid]

I described situation with jumpers on IDC & TST only. Optionally jumper can be on JMP for FCM to open (but this doesn't matter anyway).
So what to do with blue cable? Why ground is not coming on it when necessary?

[Richard L]

I don't know why the blue wire is not grounding when triggered.

Question, when you do the TST test, does the ">95%" led come on at the controller?

Do you have a digital multimeter?

[fplucid]

Yes, all 3 leds are lit as they should. I will try to replace rj45 connectors... don't know whether it will help or not...