OBC Hack

[vza]

Hi all, 99 Boxster w/ 996 cluster. Going to do the OBC hack with momentary switch instead of using the stalk. First I assume if my cluster shows the temp the OBC is enabled.Second question …..can I use the mirror selector switch 99661324100  (it has 4 switch positions ) instead of using 2 separate rocker switches? 

Edited August 10, 2019 by vza

[JFP in PA]

9 hours ago, vza said:

Hi all, 99 Boxster w/ 996 cluster. Going to do the OBC hack with momentary switch instead of using the stalk. First I assume if my cluster shows the temp the OBC is enabled.Second question …..can I use the mirror selector switch 99661324100  (it has 4 switch positions ) instead of using 2 separate rocker switches? 

 

Probably not, the stalk functions as a momentary contact switch, if the mirror selector switch is on/off in two of the  four positions, that would cause the OBC to continuously cycle in those position. You are also going to either purchase a premade aftermarket wiring harnesses for the cluster to function with either a dash switch or with the fourth stalk, or make up your own. Fabing your own is going to require finding specific size pin connectors to match the connectors already in the dash.  VW used to carry them.  It is much cleaner to use the fourth stalk, which can actually added without taking the column apart, or simply source the four stalk multifunctional switch and replace the three stalk.  We have done several of these, but always replaced the multifunction switch with the four stalk version to retain the clean factory look to the conversion.

 

If your dash displays the outside temp, the system is active.

[vza]

Was thinking the momentary 4 way to adjust mirror side to side up down would do it....so use a window or well light switch? thanks V

[JFP in PA]

7 minutes ago, vza said:

Was thinking the momentary 4 way to adjust mirror side to side up down would do it....so use a window or well light switch? thanks V

 

Problem is that the fourth stalk moves on two axis; forward and back, and up and down.  If the mirror switch can mimic those motions, and generate momentary contact, it might work.  You would need to research the wiring as I have no experience trying to do it this way.

[vza]

That's what I was thinking ...that the mirror switch moves on 2 axis as well and ignore the mirror 'switch over' switch. Maybe I'll pull mine and try first. Thanks JFP