Astra h brake light switch/cruise control fault

Ardennes1944

i handed in the astra to an auto leccy 3 weeks ago to solve its battery problem and it is indeed solved. he wired a direct ignition wire from the fuse box in the engine bay to the radio wiring and now it works lovely. as i drove away a "check brake light" message came up on the screen. i checked that my brake lights were working and they were so i drove away as i was getting late for work. the error comes up everytime i start the ignition which i could deal with but now my cruise control wont work and ive read that the two are intertwined which i should have thought of.

the ignition wire is connected to an empty fuse slot which is for "transmission electronics" , but there are 3 slots for this and i have a 30amp fuse in one of them so i doubt it was ever used.
does anyone have an idea why the ignition wire would cause this error? the brake lights work fine which is the puzzling thing.



also, i did a pedal test for errors and got the error P1530 which is listed as:

P1530 A/C Relay Voltage High Heating, Ventilation and Air Conditioning System B-017
P1530 A/C Relay Voltage Low Heating, Ventilation and Air Conditioning System B-017
P1530 A/C Relay Powerstage High Temperature Heating, Ventilation and Air ConditioningSystem B-017
P1530 A/C Relay Circuit Open Heating, Ventilation and Air Conditioning System B-017

my air con has never blown cold since i got the car and the condensor never kicks in, i presumed this was cos it needed a regas and there wasnt enough pressure to start the condensor. the climate control works fine but the colder temperatures are just like a car with no air con turned to cold. but now maybe im thinking there is a more major underlying fault?


any help on either problem would be very much appreciated.

IF the auto sparks wire is removed does the problem remain? Why not run the issue by the auto spark?

Ardennes1944

i havent removed it yet but i will in a few minutes after lunch.:)

i just wanted to have a clear argument to back up my issue in case he says he did nothing to cause this fault.

removed it, message still came up. would i maybe have to disconnect the battery to get rid of the error even after removing the wire? it goes away when i press ok as it did before.

Dunno would a battery/ECU reset be needed tbh.
Was it Gerry H ?

Regardless there's no harm seeing what they say.

Ardennes1944

No it was a guy in ballincollig. I'll ring him tomorrow for sure.

Ardennes1944

ok took it back to where i had the job done. ran a diagnostic check and got

P1530 which is the aircon relay i already had so thats not it.

P0571- which is either of these 3 faults for this code:
P0571 Brake Light Switch Circuit Incorrect Signal Exterior Lighting/Turn Indicator SystemB-014
P0571 Brake Light Switch Circuit High Input Exterior Lighting/Turn Indicator System B-014
P0571 Brake Light Switch Circuit Malfunction Exterior Lighting/Turn Indicator System B-014P0620

U2105- which is either of these:
U2105 CAN-Bus no Communication with ECM (Engine Control Module) Vehicle RelatedDiagnostic Procedure B-019
U2105 CAN-Bus No Communication with ECM (Engine Control Module) Vehicle RelatedDiagnostic Procedure B-019

and finally B0655 which is : brake light switch circuit incorrect


has anyone any idea what these might point to? please!

IF I was you I'd take a spin up to Gerry H.

Ardennes1944

this guy will follow through now till its fixed for free so ill stick with him. were gonna have go with op com on thursday and see if we can pin it down more.

was hoping George D or Nissan D might have a notion