G28 - Simple Mans, Simple REDO of an G28 LP640

[Simple Man]

Nice clean up job! 

Thanks FC!  I just keep plugging away! 

[Footcutter]

Nice clean up job! 

[Simple Man]

It took a while to sort out the wiring under the dash,

Learned a lot about fiero wiring, and still have more to learn.

Fiero connectors for sale cheap, slightly used!!

On to the instrument cluster!!

[Simple Man]

Ah Ha!  Figured out what the twisted Orange and Red wires were!!
They are part of the wiper system. 

The black connector with only one wire not cut (white) was hot and was traced it to fuse block space for the wiper motor.

Not sure why the PO didn't use the fiero wiper motor power, or fuse

What I did find was a Red wire run over the top of the dash and spliced on to some wire up by the  the A/C relay and fuel pump relay, up in the front trunk area. 

I feel like I'm making some head way on this wiring mess

[Simple Man]

Good stuff Simple! I'm very jealous of your 640 taillights, I'll be running the original Murcielago one unless I find a good deal on the 640's but that's not very realistic 

I think they keep going up in price. Mine are tucked away back in bubble wrap and boxed

[Purple LP670 SV]

Good stuff Simple! I'm very jealous of your 640 taillights, I'll be running the original Murcielago one unless I find a good deal on the 640's but that's not very realistic 

[Simple Man]

Pennocks a great place to get info on the fiero. Got a couple of explanations for the 2 grn and tan wire. Both of them lead me to believe that they are not needed

"Grounding the tan/white wire turns on the BRAKE light on the cluster.
The lever has a switch that provides ground when ebrake is engaged.
Low pressure in the brake circuit allows the spool to move far enough to trip a grounding switch on the OEM bias valve.

The two green wires provide GROUND for the BULB CHECK function of the ignition switch. Pontiac made an error when wiring the Temp Gage and the HOT light, proding the bulb check ground to the Gage, rather than the light."

[Simple Man]

So back under the dash 

A few more bugs to work out.
Coming out of the bundle of wires, that mainly go to the ignition, are two green and a tan wire. These wires are attached to a black connector.   

These might be the two wires that are identified in Murci-M's fiero to sebring conversion.There are also 2 wires that were also attached to the black connector,  red and orange.

Coming out of the of the same bundle are a a red and orange wires twisted together.  These might have at one time been connected to the black connector but the red wire seems to be a heavier gauge.

Does anyone know what this connector did? 

[Simple Man]

The wiring gods smile on me today!!

I found the wire that was a cause one of my problems.  I still don't have hazard lights, but then the PO never had the hazards working on the car.

I have the fog lights hooked up with the brake lights, but not sure if I will leave them like that or not.  That is how an actual Murcielago owner did his upgrade.

http://www.safeer.us/diy-upgrade-lamborghini-murcielago-with-the-lp640-or-lp670-taillight-conversion/

[Simple Man]

After yesterdays under the dash experience, my body was feeling some pain. 

Went to the salvage yard and acquired two 1J0 973 735 connectors.

I found that the connectors had 10 openings but only 7 pins.  Search around and found a 6 pin connector with the same 2.8mm pins.

Using paper clips removed the 6 PINS

Removed the rubber stoppers form the 10 pin connector.
Added the 3 missing PINs

Cleaned up the rear harness and pulled all unused wire.  This really cleaned up the mess that was back there.

Soldered and shrink wrapped the OEM connector to the Fiero wires.

Now the the fiero is plug and play with the OEM tail light.

[Simple Man]

Good times to be had on the REDO!

Put the new brake switches in. 

I see someone drilled the backing plate for the upper switch. Why, I have no clue....

Cut a piece of metal and welded it over the hole.

I used Nuts for the switches 1/2 -  20 (fine threads)  from the electrical section of my hardware store

Cocktails and hot tub !

[Simple Man]

Nice work Simple! Really dreading going through wiring so as usual I will procrastinate!!! 

I wish I had started with a unmolested car , yes this car has been molested!  as the electrical is chopped up!

[Purple LP670 SV]

Nice work Simple! Really dreading going through wiring so as usual I will procrastinate!!! 

[Simple Man]

Making some headway...  Since my new tail lights have the OEM connector I wanted to test the PINs

had this chart from the web about a old Murci up Tail light upgrade to the new style. Made some leads using 2.8 mm connectors and  the chart is correct.

For the body side connector, Had a JPG that Mr Bull had posted to this forum a while back, but  hard to make out the part number  1J0973835.  But doing a parts search  1j0973735 is the one I believe is needed. 

[autopro]

That would drive me crazy