Search found 48 matches

by Gmac34
Thu Apr 07, 2016 8:40 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

Hello, it's been a while, but I finally got time to do the experiment. First I tried to use my iPad as a signal generator hooked directly to the sensor socket and the needle moved (I used an headphone amplifier in order to have more voltage, I don't know if the iPad alone would have been sufficient)...
by Gmac34
Tue Mar 15, 2016 2:13 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

Ok, I'll do that,
I still think of testing with the signal generator first, as it is easy and fast to connect it.

I don't know when I'll be able to experiment, probably in a couple weeks, I'll keep you posted.

Thanks for all the infos.
Giovanni
by Gmac34
Mon Mar 14, 2016 2:59 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

Interesting, it works quite differently than I thought. this actually raises further questions: - Is the capacitor part of the sensor or is it on the speedometer board? Looking at the schematics it seems to be on the board but who knows what volvo actually did, otherwise I would have to add the capa...
by Gmac34
Mon Mar 14, 2016 1:07 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

Have you measured the engine rpm sensor? If it has two wires it could be passive as well, unless the metal mounting bracket is used to connect ground (unlikely). I was thinking about connecting to the car (were the sensor would be connected) a signal generator (formerly my iPhone) to send sine wave...
by Gmac34
Sat Mar 12, 2016 6:13 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

I used a 'speed sensor' BUT bought it as a complete set , ie a sensor and speedo. Unless you are 100% sure it runs on 12V and correct resisitance etc I'd steer clear . . . . . The sensor fitted to the 480 has a square Actually the speed sensor on my 480, witch doesn't have abs, is "passive" (I pres...
by Gmac34
Sat Mar 12, 2016 5:01 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

I used a 'speed sensor' BUT bought it as a complete set , ie a sensor and speedo. Unless you are 100% sure it runs on 12V and correct resisitance etc I'd steer clear . . . . . The sensor fitted to the 480 has a square wave output, and I'm sure that the one listed does as well, it is just the level ...
by Gmac34
Fri Mar 11, 2016 3:34 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Re: Chinese Speed sensor, any advice?

Hello & welcome this one? Yes that is the model, other sellers also put some specifications in the description: Specification: MSP6729 3/8 - 24 UNF Threaded 2.5" Length with 6' Shielded Cable All are designed and tested to operate within a temperature range of -65°F to 225°F (-55°C to 105°C) . Magn...
by Gmac34
Fri Mar 11, 2016 3:27 pm
Forum: Electrical system (30)
Topic: Chinese Speed sensor, any advice?
Replies: 40
Views: 21571

Chinese Speed sensor, any advice?

Hello, I'm new to de 480 word and just bout a nice red 1989 turbo and well... it has been in the shop since :) . The speedometer doesn't work, and it is probably a bad speed sensor, bunt since it is very difficult to find a replacement I have been looking for another solution. And this is what I fou...