Indeed. Always some learning nuggets in the posts.I hope you know how much I appreciate your time and dedication to this thread. Quite a bit of fun watching it, and also even though it has been probably 40 years since I sat in one and drove it, I can still smell it (in a good way!)
What are you using to paint the chrome? I've got a couple of my mag center caps that have lost a good bit of their chrome and I was wondering if there was a good solution that was not too difficult to deal with.
Rustoleum Metallic (Chrome) FinishWhat are you using to paint the chrome? I've got a couple of my mag center caps that have lost a good bit of their chrome and I was wondering if there was a good solution that was not too difficult to deal with.
Comparing the bottom traces of the PCB with the spec for the SRD-12VDC-SLC relay in the photo, it appears that:Bought a timer relay to use to prime the fuel pump. I found out that they don't provide a wiring schematic for the port designation, which doesn't match what I'm familiar with. Any input from our electronic wizzes?
CB (87, 87a?)
COM (switched or constant input?)
CK (87, 87a?
GND (ground)
IN (trigger or ?)
VCC (trigger or?)
View attachment 78550
Comparing the bottom traces of the PCB with the spec for the SRD-12VDC-SLC relay in the photo, it appears that:
COM corresponds to terminal 30 of standard Bosch style relays
CB -> 87a (Normally closed)
CK -> 87 (Normally open)
Which means that there should be continuity between COM and CB when the circuit is not powered; easy enough to verify.
And if the labeling follows normal nomenclature, GND is ground, VCC is positive supply voltage and IN is the trigger input.
Yes, the timer part needs power to operate. Depending on how it behaves at startup, you may be able to connect VCC, IN and COM to ignition switched power, GND to ground and CK to the fuel pump. What might throw a wrench in this is that the timer may need to see the IN signal going from low to high after the timer circuit is powered up. One would hope that the timer retains the delay setting after powered is removed.Thank you.
So, what's confusing to me is the VCC input. That is needed for the relay timer circuit to operate? I was thinking of it in terms of a standard relay where the only supply would be on 30 - but since this has a timer circuit, VCC is what governs that I'm assuming.
Yes, the timer part needs power to operate. Depending on how it behaves at startup, you may be able to connect VCC, IN and COM to ignition switched power, GND to ground and CK to the fuel pump. What might throw a wrench in this is that the timer may need to see the IN signal going from low to high after the timer circuit is powered up. One would hope that the timer retains the delay setting after powered is removed.