Please can somebody help me? After disconnecting radio tacho, RPM meter and blinkers (direction lights) stop working at all. All fuses I can find are OK and all other electrical environments are working fine.I am located in Prague Czech Republic and have no access to good service or service documentation. Thanks for advices.
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Ahoj, @Daniel Stastny!
To begin, none of us on here have any experience with a PGO (French?) Speedster.
I am also not sure what a "radio tacho" is - Can you describe with different words or a picture? Does it measure road speed (We would call it a "Speedometer" here in America).
The dash gauges and the blinkers probably get their power from the ignition fuse so that they stop working when the key switch is "off".
I think that when you removed the radio tacho you disconnected a wire to the other things by mistake - Not hard to do.....It's pretty crowded behind the dashboard.
Look around behind the engine RPM meter to find the +12 Volt power from the fuses (Usually a RED wire) and see if anything is disconnected. Same for the blinkers - The +12 Volt wire is probably red.
I have attached the wire picture for the back of VDO gauges (I hope your gauges are 356-style VDO-style. Maybe this will help. Click on the attachment below:
Sounds like a disconnected and forgotten ground wire to me. Very common on fiberglass cars.
Right on with missing ground. It doesn't hurt to add redundant (extra) grounds. I'm guessing he had missing comma - radio, tacho. Take a 3 foot piece of wire with alligator clips on either end and use to test by adding the ground. When doing my dash grounds - I used a single wire with spade clips for grounds ever 6-8 inches -- if the ground connection comes loose, corrodes or breaks - nothing works. But I saved 6 feet of wire and a rats nest under dash.
Post some photo of your PGO Speedster - haven't seen one in years. I recall they were somewhat stylized over a normal 356 mold - nice slightly more modern flared fenders.
Dear all, thanks a lot for your advices, I will try tomorrow your sugestions with ground wire. Regarding my message I like to correct:
Corrected message: I was disconnect radio conectors and after this my speedmeter and RPM meter and blinkers was stop working.
Sounds like a ground is disconnected. Run a separate one from each gauge to a solid ground point under the dash and it will probably be OK, unless the power went through the radio, check that too.
