Speedometer Sensor

Picard1701 · **Posted:** Mon Aug 26, 2019 10:02 am

So I purchased an ancient but new Blaupunkt SatNav which will look great and retro in the 944.

BUT

It is so old, it needs a Speedometer signal!! Is there a nice place to tape in safety for that please?

I do have the dash out right now!

Thank you

Waylander · **Posted:** Mon Aug 26, 2019 11:04 am

Not sure what a satnav would need a very inaccurate speed signal for
What would you do if it was a 924 with a cable rather than electrical speedo

I don’t believe there is any way to “tap” into the speedo electronics with out upsetting the rest of the car

Picard1701 · **Posted:** Mon Aug 26, 2019 1:36 pm

Waylander wrote:

Not sure what a satnav would need a very inaccurate speed signal for
What would you do if it was a 924 with a cable rather than electrical speedo

I don’t believe there is any way to “tap” into the speedo electronics with out upsetting the rest of the car

I hear ya!!! Very weird.

See the wiring these instructions, maybe I can ignore it.

https://www.google.com/url?sa=t&source= ... RtuFfWJPzL

Waylander · **Posted:** Mon Aug 26, 2019 2:26 pm

It would appear it's only needed for distance traveled
There is an option for a wheel sensor

Picard1701 · **Posted:** Mon Aug 26, 2019 3:59 pm

Waylander wrote:

It would appear it's only needed for distance traveled
There is an option for a wheel sensor

Thanks. Think I'll leave the wire off, see if the SatNav will function normally. If so, all good.

Thanks for coming back.

Waylander · **Posted:** Mon Aug 26, 2019 5:29 pm

It should because satellite navigation works with time signals from satellites the clue is in the name

Has nothing to do with any cars speedo, you could hang the car below a helicopter and it would still know where it was

Picard1701 · **Posted:** Mon Aug 26, 2019 5:53 pm

Waylander wrote:

It should because satellite navigation works with time signals from satellites the clue is in the name

Has nothing to do with any cars speedo, you could hang the car below a helicopter and it would still know where it was

Lol!!!!!! Interesting that I have to connect a wire from the reverse lamps!!! Can't think of a reason why :shock:

scam75 · **Posted:** Mon Aug 26, 2019 6:28 pm

Sounds like you're wiring up the starship enterprise there my friend................

Stuart

Picard1701 · **Posted:** Mon Aug 26, 2019 7:46 pm

scam75 wrote:

Sounds like you're wiring up the starship enterprise there my friend................

Stuart

A retro Blaupunkt unit is more complicated than the Enterprise lol!!!!

Endoman · **Posted:** Tue Aug 27, 2019 11:55 am

Early Beckers also needed the speedo and reverse feed. They even supplied an adapter for the cable type. On the S2 I tapped into a wire behind the instrument binnacle but upgraded to an Indanapolis Pro which doesn't need it. Love Beckers they look just right. The 993 has a Cascade with a software hack to give speed camera warnings very handy on strange roads. Maps are pretty crap but voice direction good and accurate. I use the Iphone more as satnav.

Picard1701 · **Posted:** Tue Aug 27, 2019 12:30 pm

Endoman wrote:

Early Beckers also needed the speedo and reverse feed. They even supplied an adapter for the cable type. On the S2 I tapped into a wire behind the instrument binnacle but upgraded to an Indanapolis Pro which doesn't need it. Love Beckers they look just right. The 993 has a Cascade with a software hack to give speed camera warnings very handy on strange roads. Maps are pretty crap but voice direction good and accurate. I use the Iphone more as satnav.

Thank you. I can tap on the reverse feed easily. If I don't add the Speedo, will it function ok? Thank you.

gothatway · **Posted:** Fri Sep 06, 2019 7:15 pm

I have tapped into the speedo sensor circuit to provide feed for an accurate rally trip meter on my oval dash '85. I connected into it under the boot carpet before it disappears into the loom and then ran the wire (together with additional permanent live and earth wires from the battery) under the carpet to come up beside the radio. Straightforward, didn't need to remove the dash and certainly hasn't interfered with the speedo/trip operation.

On a previous square dash car I fitted a Terratrip sensor onto the mechanical speedo cable under the bonnet.

Edited to say that of course what I wanted was distance, not speed !

Picard1701 · **Posted:** Sat Sep 07, 2019 9:15 am

gothatway wrote:

I have tapped into the speedo sensor circuit to provide feed for an accurate rally trip meter on my oval dash '85. I connected into it under the boot carpet before it disappears into the loom and then ran the wire (together with additional permanent live and earth wires from the battery) under the carpet to come up beside the radio. Straightforward, didn't need to remove the dash and certainly hasn't interfered with the speedo/trip operation.

On a previous square dash car I fitted a Terratrip sensor onto the mechanical speedo cable under the bonnet.

Thank you, that is great info. Will have a look.

Edited to say that of course what I wanted was distance, not speed !

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Speedometer Sensor

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