testing a crossover

CORRECTION, sorry. The last test on the mid/hi amp terminals on the crossover board; when I asked to to test and then reverse the meter leads and test again. The multimeter should be set on the "diode" test mode, not ohms. The readout should display some voltage then go to OL. When you immediately reverse the leads, the display should read -x.xxx volts, then change to +x.xxx volts before going to OL. Hope your meter has a diode test function, but it's not absolutely necessary. This test just shows that the caps are charging in both directions.
I still can't explain why the system worked with one amp when the mid/high amp was in repair... This is troubling. 

You can find all the photos here

https://systems.audiogon.com/

Without drivers connected,
The HF measurement should equal to the DC resistance of the 0.22mH inductor.
The MF measurement should equal to the DC resistance of the 2.5mH inductor + 2.2Ω.

Hi guys, sorry for the very late reply in my/your quest to sort this out,ive done a couple of thing since, taken advice on multi meter/s, fitting fully charged battery's in the digital and analogue multi meters,both tested by using an 8ohm resistor, I use for running in component/gear, just incase, removed all wire to and from the x over and cleaned the board,and flowed every joint,so there no chance of dry joints and shorts,also i have done a continuity test from every component lead to pcb tracks,all joint good, please find results of questions asked.
multi meter set to ohms-
between mid pos and neg  2.7 ohms
between tw   pos and neg  0.002 ohms
mid/high inputs  OL {held on for 5 secs}nothing changes
mid/high inputs {reversed} OL{held on for 5 secs}nothing changes
when run with one amp,in bi-wire mode both pos are NOT connected the same goes for the neg wires,the amp has 2 sets of switched speakers terminals,i use one set for the bass and the other set for the mid/high,so the two speaker cables do not touch each other 
resistor showing short{5w2R2J},which i measured using continuity mode,just above IP neg,when doing an ohms test is reads 2.3ohms

Diode test on mid/high -OL
when reversed is flashes 2.2xx,then goes to OL
every time i reverse leads it flashes something {2.2xx}not sure its voltage,it doesnt tell me that

further to reply to imhififan1 im not sure how to test for what your asking 
" Without drivers connected,
The HF measurement should equal to the DC resistance of the 0.22mH inductor.
The MF measurement should equal to the DC resistance of the 2.5mH inductor + 2.2Ω.".
Not sure what 0.22mH is and also 2.5mH inductor +2.2 ohms,i know what the inductors are but not sure on mH.
Also i have found that one of the capacitors has a dead short short when tested in dioode mode,{still soldered into pcb},on both x-overs, when the rest show OL,not sure if that has a bearing on anything, just throwing it out there.
Any guys sorry again for the late reply,i hope your all still speaking to me, thankyou again for all your help.
Kind regards
Mk
ps i have posted some more pic of cap showing short and the resistor ive tested
thx again MK

between mid pos and neg 2.7 ohms

Okay... before you said that you were getting 0Ω across the MF +/- outputs with the driver disconnected. Is this the same measurement? If it is then it's close enough not to worry about for this exercise. As imhififan said:

The MF measurement should equal to the DC resistance of the 2.5mH inductor + 2.2Ω.".

Take into account there's a bit of tolerance on those resistors as well as the accuracy of your meter.

Not sure what 0.22mH is and also 2.5mH inductor +2.2 ohms,i know what the inductors are but not sure on mH.

Although the inductors will have some DC resistance you can pretty much ignore it for the purposes of this excercise as long as you're in the ball park of the resistor values.

Also i have found that one of the capacitors has a dead short short when tested in dioode mode,{still soldered into pcb},on both x-overs, when the rest show OL,not sure if that has a bearing on anything, just throwing it out there.

If that's the 6µF cap then the reading is correct as it's in parallel with the 2.5µH inductor which will have very low resistance at DC.

If I've understood you correctly then the tests don't seem to have turned up any results that would cause the amplifier to fail.
Maybe someone else will spot something I've missed... or maybe the tech didn't find the real fault in the amp when it was sent in the first time.