Electrics: 70: - '98 cruise control retrofit - Page 2

Cookeh · Nov 7th, 2019, 12:43

I have no experience of the diesels, I can only go by what I have access to in the shape of service manuals. Please take it all with a huge pinch of salt and do your own research too.

Cookeh · Nov 7th, 2019, 13:36

Double post...

Richard_TD · Nov 8th, 2019, 06:21

The cruise on the diesels is all electronic. I believe you just need the switch and a set of clocks from a diesel with cruise.

mihkelaa · Nov 8th, 2019, 06:32

If you could check that would be great,i'm trying to get all the items installed.

Richard_TD · Nov 9th, 2019, 05:54

I don't have any way of checking unfortunately, and I can't immediately find where I read the information.

A friend of my son's is planning to do the same job, if he does manage it I'll report back.

Another thing you would need on your car is a switch for the clutch pedal. I'm not sure what that looks like on the diesels but the wiring should be there already.

rudi dudi · Nov 10th, 2019, 18:19

Quote:

Originally Posted by Cookeh

Off the top of my head, it's something like this:

Pedal assembly plus the two servos on brake and clutch oedals
Vacuum servo that is based near the pedal assembly
Cruise control stalk
Cruise control pump and regulator that lives under the battery tray
Cruise control relay

Then of course you'll need a few metres of vacuum tubing. Whilst retrofitting is possible it is a bit of a pain and requires rather a lot of disassembly..!

Right reporting back as promised.
What I thought was true and the above is completely incorrect for the diesel.
A diesel fly by wire pump (as I previously mentioned) is never going to work off a vacuum for cruise control.

Cookeh · Nov 10th, 2019, 20:56

Quote:

Originally Posted by rudi dudi

Right reporting back as promised.
What I thought was true and the above is completely incorrect for the diesel.
A diesel fly by wire pump (as I previously mentioned) is never going to work off a vacuum for cruise control.

Perfect. Good to know, as outlined above I was just going by the one resource I had access too - and the service manual did not specify any difference. It is fantastic knowing that the diesel is much easier to retrofit to, and to as such be able to properly answer the OP.

scutyde · Nov 14th, 2019, 14:12

Cruise on diesels is a software function in the ECU. You could look for an ECU which had Cruise function and retrofit it together with the stalk.
Also needed ar the switches on the pedals so that the ECU registers if you brake or pressed the clutch.

Nov 7th, 2019, 12:43	#11
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	I have no experience of the diesels, I can only go by what I have access to in the shape of service manuals. Please take it all with a huge pinch of salt and do your own research too. __________________ 1995 Volvo 850 T5 Estate (Manual)

Nov 7th, 2019, 13:36	#12
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	Double post... __________________ 1995 Volvo 850 T5 Estate (Manual)

Nov 8th, 2019, 06:21	#13
Richard_TD Master Member Last Online: Mar 13th, 2020 17:15 Join Date: Mar 2009 Location: Fife	The cruise on the diesels is all electronic. I believe you just need the switch and a set of clocks from a diesel with cruise. __________________ 1996 Volvo 855 2.5 20V GLT

Nov 9th, 2019, 05:54	#15
Richard_TD Master Member Last Online: Mar 13th, 2020 17:15 Join Date: Mar 2009 Location: Fife	I don't have any way of checking unfortunately, and I can't immediately find where I read the information. A friend of my son's is planning to do the same job, if he does manage it I'll report back. Another thing you would need on your car is a switch for the clutch pedal. I'm not sure what that looks like on the diesels but the wiring should be there already. __________________ 1996 Volvo 855 2.5 20V GLT

Nov 14th, 2019, 14:12	#18
scutyde Retrofit master Last Online: Mar 28th, 2022 10:14 Join Date: Mar 2010 Location: Berlin	Cruise on diesels is a software function in the ECU. You could look for an ECU which had Cruise function and retrofit it together with the stalk. Also needed ar the switches on the pedals so that the ECU registers if you brake or pressed the clutch. __________________ Volvo 850 2.5 20V MY95 Pictures Here what I retroffited so far List

Nov 8th, 2019, 06:32	#14
mihkelaa New Member Last Online: Oct 20th, 2022 19:27 Join Date: Nov 2019 Location: Tallinn	If you could check that would be great,i'm trying to get all the items installed.

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