Alan S (NSW) posted:

I have tripled checked all the wiring to the stereo. I have intercepted the ignition 12v line to the stereo. There is a permanent 12v line to the stereo but I haven't cut that because if I did I would loose all stereo memory every time the phone rang. The same issue exists using the CD player. Thanks for your suggestions.

One possible guess coule be that there is noise on the wiring that is causing the relay to trip but I can't be sure.

Thanks for your suggestions.

BenSpoon posted:

Theres a good one... I looked thru the Nokia destructions for installing and it really has me wondering how/why it would be different when the engine is running- it is a pretty simple setup.

Have you tried sticking a multimeter onto the 85 terminal (-'ve) and seeing if it wavers at all when the radio comes back on when it shouldnt? It should drop to 0V when the radio gets turned off and only get back to 12V when the radio is to come on/call is ended.

Can you actually hear the relay click back closed when the engine is running and you still have an active call?

Alan S (NSW) posted:

Yep, I can hear the relay click back closed when the engine is running. I did all testing with the ignition on and the engine off. I replaced the dash before I discovered the problem. I'll have a closer look next weekend.

Thanks

Alan S (NSW) posted:

Looks like Captain may have the answer!

Alan S (NSW) posted:

Thanks for that, that is a great help. I'll head off today and try to source one.
I have never played with relay's before, do you know if lower amp relays have the same configuration / pin numbering etc??

Member - Captain (WA) posted:

The relay I used had no numbers on the 5 pins. But it had a clear case and you could easily see where each pin was connected. Just a matter of working out which pin goes to which part of the relay then comparing to the diagram in the Nokia install kit manual. I soldered leads onto the relay pins as they were designed for use in a circuit board configuration. I commoned the 12V radio supply (pin 30 in Nokia diagram) and the 12V supplied to the coil (pin 86), saves running an additional wire.

Cheers

Captain

BenSpoon posted:

I recall the manual saying something like the relay must be less than 100 Ohm resistance at <16V. All the relays I have come across have had the same numbering format on them on the pins.

Member - Athol (NSW) posted:

Ditto, for me works every time.

Athol

Alan S (NSW) posted:

That's still working for me too but look how much energy I am going to save by making it automatic ;-)