gps speedo conversion

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hilla311

Member - Posts: 3

Joined: April 06, 2014

Location: Australia

Posted: April 06, 2014 at 6:19 AM / IP Logged

Has anyone fitted a GPS module/pulse antenna, to a oem electric speedo?

Something like this marine one, a few other manufactures make them for the gauges like auto meter

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: April 06, 2014 at 6:55 AM / IP Logged

Yes.

howie (aka: harryharris)

Silver - Posts: 355

Joined: February 17, 2014

Location: Florida, United States

Posted: April 06, 2014 at 8:22 AM / IP Logged

And it will be a minimum of 5-10 seconds behind your real speed.

I use mine as a true speed back-up, most OEM speedos are about 2-3% fast.

Test before boxing up.

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: April 06, 2014 at 10:09 AM / IP Logged

Is that due to that unit?

GPS units themselves should be quick. I haven't noticed any delay on any of mine once they lock in. And of course tunnels and buildings are problem.

howie (aka: harryharris)

Silver - Posts: 355

Joined: February 17, 2014

Location: Florida, United States

Posted: April 06, 2014 at 10:19 AM / IP Logged

You can work it out it's probably 1-2 seconds, time from signal pickup to chip to output.

Cold foggy UK winters don't help either.

Test before boxing up.

hilla311

Member - Posts: 3

Joined: April 06, 2014

Location: Australia

Posted: April 06, 2014 at 10:03 PM / IP Logged

oldspark wrote:

Yes.

Hi old spark, did you cut the speed signal wiring at the speedo and joined in the GPS signal wire?

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: April 06, 2014 at 11:43 PM / IP Logged

No. I didn't do it.

Is yours an 8k or 16k speedo?

hilla311

Member - Posts: 3

Joined: April 06, 2014

Location: Australia

Posted: April 07, 2014 at 12:02 AM / IP Logged

I'm unsure, the vehicle is a 2012 hiace diesel, how can I determine if its 8k or 16k

oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: April 07, 2014 at 12:37 PM / IP Logged

Maybe google or a hiace forum.

But as I understand that unit, you'd better find out before you buy.

And I presume you haven't understood how it connects if you are taking about cutting the speed signal wiring - unless I've read the wrong spec.

howie (aka: harryharris)

Silver - Posts: 355

Joined: February 17, 2014

Location: Florida, United States

Posted: April 07, 2014 at 12:40 PM / IP Logged

Yes, no cutting those three leads go to the speedo head, red = 12V+ ign., black = earth and grey = signal.

Test before boxing up.

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gps speedo conversion

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