siscogts

Hi, I am so stupid to cause a short between the + point at the front right of engine bay and the ground point just above right ignition coil.
What could I have damaged? What this ground point is for?
I have detached battery cables, I am waiting for a response now,won't touch anything before your expert replies. thank you

Herman K

Your are saying some thing is shorted out?
It looks like you have a wire coming from behind the jump post where the heavy red wire connects to follow it and see were it goes also pull the 14 pin connector that looks like the little black box to the right of it from its socket and remove the end cap of it so you can inspect all the wire attachment inside of it.

With battery wire disconnected there nothing that can go wrong while you check this out

siscogts

Yep, Shorted the ground wire with those red jump post cables.

Leon Speed

Ground point III. Have to look up what it's for.

Leon Speed

Ok, GP III are grounds for the final stages. Hope you didn't fry them

I would connect the battery again and switch on the contact. See/smell for funny stuff. Then try to start the car. If no start, look at the final stages.

Herman K

Check to see if the final stage (fan speed control box with the black cooling fins on it when you open the hood) pull of the round plug that is held down by the clip with one screw.

With the battery re-connected
jump pin 5 -8 should make one fan run
jump pin 1-4 make the other one run

If they don't check fuse 29 and 30 (30amps) on the GTS model

Alan

Were the brown wires still bolted to the ground point when the short happened or were they disconnected and dangling in free air..

If the former - all you did was short directly across the battery - and it likely had no other impact. If the battery measures OK you should be fine.

The second case is harder to assess:

GP II is for the ignition final stages (not the fan final stages). These are simple high current electronic switching circuits for the coils - if the car starts & runs you are OK.
taking the output stage ground to battery voltage means likely reverse biassing the output stages since the ignition power feed to the final stages will be pulled to ~0V via the other ignition loads

So the outcome depends on how well the output stages are protected against that. It is unlikely you damaged anything else...

Alan

siscogts

Disconnected and dangling in free air: I removed bolt and I was trying to find a place for the wire, I wanted to look at the brass ground point on the body, firstly, then clean the wires connector.... Then the little spark.
Thanks a lot for your helpful replies, dunno why I had not detached battery cables before starting the job....

siscogts

I think I blown both fuses, fans now run properly.
Otherwise I think the final stage had the same destiny of fuses. Don't mind, I can fix that and have all the internal parts I'm my garage.

siscogts

checked every sensors and relais....Relais internally got a bad sparks probably, they have burnt contacts, I will change them....

Francesco

Mrmerlin

put some deoxit on the relay internal contacts