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biarritz 1990 4.5 "system problem" on climate control panel

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Hello,please i need help to diagnose failures on my electronic control system.

I've tried all obd 1 self diagnostic procédures,warmer and off buttons,paperclip, sometimes the panel shows the "temperature 24 degrees" or "oïl change" or sometimes the screen is blank, but in finale the other panel beneath always shows "system problem".

for information the a/c compressor is dead and a/c system is not yet rebuild.

The clusters dont shows the rpm and speed,or the gearposition(only sometimes)

This eldorado was not running when i bought it,, i've rebuild totaly the engine and the gearbox ,the engine start fine and gears seems ok.

What else could i do

greetings from belgium,dominic

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You are going to have to troubleshoot the electrical gremlins that can be just about anywhere in the circuits. I would start with the easiest. Check the fuses and behind the fuses for corrosion. Maybe a pinched wire during the mechanical repairs? Did this problem exist before the work?

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It sounds like the digital dash has a problem. In the US, a Delco Electronics shop can repair the digitial display. I don't know if there would be a Delco Electronics shop in Belgium though.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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