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Re: Updated MFA installation
I really value this info as I have a MFA setup I'll be hooking into my
rocco.
I'd like to suggest that we put this one up for Tech procedure, simply
because of it's unique nature and that few people are doing this. It's kind
of rare stuff. I can form it up into a HTML page if desired. We don't have
pics at this point, though (not that they are necessary).
Gabriel, thanks so much for your time in putting this info down in writing.
I, for one, will definitely benefit from it.
-PK
> This will apply to Scirocco's 82-88, Jetta's/Golf's/GTi's 85-89. This has
> been updated.
>
> Tools
> -Small blade screwdriver(like the one used for eyeglass repair)
> -Wire cutter
>
> Parts needed
> -MFA Intrument cluster. Can be from any Jetta/GTi/Golf 85-89, Scirocco MK2
> 82-88 with the right tach/speedo combination for the one your replacing,
or
> an upgraded one for the one your replacing (8k/160 to 8k/140, 8k/140 to
> 7k/120).
> -MFA control switch. Preferebly out of a GTi/Golf 85-87, Scirocco 82-88,
so
> the rear wiper contacts are there.(Mine is from an 88-89 And works and
looks
> nice but the top plastic cover has to be either changed for the 88-89 one
or
> the existing one cut cause the turn signal switch will have to be used).
> -MFA control wiring. This is the wiring to wich the MFA switch will be
> conected to. This is the same for all models (Scirocco 82-88,
Golf/GTi/Jetta
> 85-89).
> -Vaccum "T" conector and 5 feet of vaccum hose. I got this from the power
> lock system out of a Jetta.
>
> Procedure
>
> Salvage Operation (If you bought your parts new skip this)
>
> 1.Go to your local salvage yard and find a VW with the MFA setup that has
> the tach/speedo combination of your choice.
>
> 2.Remove the sterring wheels center cover, then the center nut and remove
> the steering wheel.
>
> 3.Now remove the 3 small blade screws that hold the MFA switch, unplug the
> connectors on either side of the switch. Now there are 4 thin wires that
run
> together into a single plug(red,blue,white,black). Disconnect this plug
and
> pull the whole switch assambley out.
>
> Jetta Golf GTi donor car.
>
> 4a.Disconect and pull out the headlight switch, blinker switch, defroster
> switch, radio and A/C control face plate. Now remove the screws located
one
> behind headlight switch, two in the upper part in front of the instrument
> cluster, one behind the blind cover under the blinker switch, two in the
> upper part in the radio bay, and three? in the lower part in the A/C panel
> faceplate location (please correct my if I'm wrong).Then carefully pull
out
> the plastic faceplate.
>
> 5a.Disconect the two wire harness connectors (one white, one black) to the
> instrument cluster located in the bottom corners of the cluster. Now
remove
> the speedometer cable, easier if you have removed the bottom dash covers.
> Now remove the 2 screws that hold the cluster in place located in the
upper
> side corners of the instrument cluster. Tilt the cluster towards you a
> little bit and pull off carefully the vaccum hose located on the back of
the
> cluster. Now pull the cluster out.
>
> Scirocco donor car.
>
> 4b.Remove the two screws located on the upper top part of the plastic
cover
> in front of the instrument cluster and remove the plastic cover.
>
> 5b.Disconect the two wire harness connectors (one white, one black) to the
> instrument cluster located in the bottom corners of the cluster. Now
remove
> the speedometer cable, easier if you have removed the bottom dash covers.
> Now remove the screw that holds the cluster in place located in the center
> top of the instrument cluster. Tilt the cluster towards you a little bit
and
> pull off carefully the vaccum hose located on the back of the cluster. Now
> pull the cluster out.
>
> 6.You'll need to remove the relay panel, for this loosen the screw on the
> lower right side of the panel (on some models there might be a plastic
lock.
> Twist this lock 1/4 turn clockwise? then pull it out). Lift the panel and
> then pull it towards you to get it out.
>
> 7.Trace the wires from the connector on the MFA control
> switch(red/white,black/white,brown/white,white) the brown/white cable
should
> connect to a groung connector where there will be another brown cable.
>
> MFA Connector
> | _Brown___________________Instrument panel
> | |
> | | harness connector
> |___________________|red connector_
> Brown/white |
> _|_ brown white
> -
> ground
>
> The connector will be red in color located behind the relay panel. Unplug
> this and then trace back the brown cable to the cluster's harness white
> connector. The connectors in the harness hold the cables using a small
> plastic prong. Using the small screwdriver lift the prong wich holds the
> brown cable and pull the cable out. The cables go as noted by the Bentley
> manual:
>
> White - W
> Black/white - B
> Red/White - R
> Brown - M
>
> |-------|-------| |-------|-------|
> |_*_*_M_*_*_*_*_| |_*_*_*_*_*_B_*_|
> |_*_*_*_*_W_*_*_| |_*_*_*_*_*_*_R_|
>
> White connector Black connector
>
> It should come off very easy (don't pull to hard on the cable or you might
> break it!). Repeat the procedure for the other 3 wires. Then carefully
> remove the MFA switch plug with the wires as a mini harness cutting out
all
> the straps that hold the wires in place. You'll also need to get 3 more
> wires that connect to the oil temp sender and the outside temp sensor.
These
> cables are noted by the Bentley as follows:
>
> White/red - R
> White/blue - B
> Green/black - G
>
> |-------|-------|
> |_*_*_*_*_*_G_*_|
> |_*_*_*_B_*_R_*_|
>
> White connector
>
>
> Trace this wires the W/R and W/BL will connect at a double connector
behind
> the relay panel. The G/BK will lead to a single connector behind the relay
> panel. Disconect these conectors and keep trailing the wires into the
engine
> compartment where youll find both sensors (if you are lucky) Keep these
> other wiring even without the sensors so youll have the entire wiring.
>
> Installing operation
>
> NOTE: DISCONNECT THE BATTERY.
>
> 8.Remove the steering wheels center cover, then the center nut and remove
> the steering wheel.
>
> 9.Now remove the 3 small blade screws that hold the MFA switch, unplug the
> connectors on either side of the switch. Now there are 4 thin wires that
run
> together into a single plug(red,blue,white,yellow?). Disconnect this plug
> and pull the whole switch assambley out.
>
> Jetta, Golf, GTi car.
>
> 10a.Disconect and pull out the headlight switch, blinker switch, defroster
> switch, radio and A/C control face plate. Now remove the screws located
one
> behind headlight switch, two in the upper part in front of the instrument
> cluster, one behind the blind cover under the blinker switch, two in the
> upper part in the radio bay, and three? in the lower part in the A/C panel
> faceplate location (please correct my if I'm wrong).Then carefully pull
out
> the plastic faceplate.
>
> 11a.Disconect the two wire harness connectors (one white, one black) to
the
> instrument cluster located in the bottom corners of the cluster. Now
remove
> the speedometer cable, easier if you have removed the bottom dash covers.
> Now remove the 2 screws that hold the cluster in place located in the
upper
> side corners of the instrument cluster. Now pull the cluster out.
>
> Scirocco car.
>
> 10b.Remove the two screws located on the upper top part of the plastic
cover
> in front of the instrument cluster and remove the plastic cover.
>
> 11b.Disconect the two wire harness connectors (one white, one black) to
the
> instrument cluster located in the bottom corners of the cluster. Now
remove
> the speedometer cable, easier if you have removed the bottom dash covers.
> Now remove the screw that holds the cluster in place located in the center
> top of the instrument cluster. Now pull the cluster out.
>
> 12. The Bentley gives the following setup:
>
> White - W
> Black/white - B
> Red/White - R
> Brown - M
>
> |-------|-------| |-------|-------|
> |_*_*_M_*_*_*_*_| |_*_*_*_*_*_B_*_|
> |_*_*_*_*_W_*_*_| |_*_*_*_*_*_*_R_|
>
> White connector Black connector
>
> This is the setup for the 3 more wires that connect the oil temp sender
and
> the outside temp sensor. These cables are noted by the Bentley as follows:
>
> White/red - R
> White/blue - B
> Green/black - G
>
> |-------|-------|
> |_*_*_*_*_*_G_*_|
> |_*_*_*_B_*_R_*_|
>
> White connector
>
>
> Route these wires trough the firewall into the engine compartment. Both
> sensors should be put in the same locations as the donor car. Now route
and
> attach the wiring to the existing wiring using tie-wraps.
>
> 13.Open the hood and go to the engine compartment. There is one large hose
> that goes from the vaccum booster to the intake manifold. Along this hose
> there is a vaccum PCV valve with two small vaccum hoses comming out from
it.
> One goes to the small computer (OXS computer?) and the other one goes to a
> vaccum reservoir? behing the right fender. Cut the one that goes to the
> reservoir? and attach the vacumm "T" connector. To the remaining free
> conection of the "T" attach the vaccum hose routed for the cluster. Route
> the hose troughout the firewall and up to where the instrument cluster
will
> be.
>
> 14.Connect the vaccum hose to the MFA cluster and fasten the cluster in
> position. Set the screw that holds the cluster in place located in the
> center top of the instrument cluster. Now reatach the speedometer cable,
> easier if you have removed the bottom dash covers. Connect the two wire
> harness connectors (one white, one black) to the instrument cluster
located
> in the bottom corners of the cluster. Reatach the plastic cover in front
of
> the instrument cluster fastening the two screws located on the upper top
> part of it.
>
> 15.If you are using 88-89 MFA switch you'll need to replace the plastic
> cover that goes on top of the steering column's lock. Since this switch
only
> fits with the matching turn signal switch. Other solution is to lenghten
the
> groove made for the signal switch to slide upward. I used a hacksaw blade
to
> lenghten it by 3/4 of an inch.
>
> 16.Now reatach the 3 small blade screws that hold the MFA switch, plug the
> connectors on either side of the switch. Attach the connector holding the
4
> thin wires (red,blue,white,black) to the connector in the MFA wiring
> harness.
>
> 17.Reinstall the steering wheel, tighten the nut and reatach the center
> cover.
>
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>
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