Can someone please explain to me what the start bridge relay does?
#16
Electron Wrangler
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The sole purpose of the switch is to dissengage the cruise during gear changes - then it auto resumes - this features works very well - but is rather important on a manual car, lest the Bwaahh! becometh too much....
Apparently only the drivers of Rogerboxes need to be protected against themselves for inadvertent starter issues...
Alan
Apparently only the drivers of Rogerboxes need to be protected against themselves for inadvertent starter issues...
Alan
Last edited by Alan; 12-11-2012 at 09:10 PM.
#17
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#18
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Regarding starter bridge for manual cars: configuration changed for 1982 MY.
That bridge only exists in the CE panel of manual cars, MY 1981 and earlier.
(Alan is picturing a bridge in a late model panel, maybe his 94, for which purpose is a backup light bridge)
Mid year manual cars have a start bridge, but its located in the hatch area.
And, beginning 1982, both auto and manuals have the start relay.
See the first 2 documents below.
The confusion comes in when people with manual cars newer than 1981 go searching for the start bridge so solve a no-turnover issue and find a relay.
Its perpetuated because the manual start bridge is referenced in relay diagrams, including PET and 928specialist site, and has a part number. This co-location infers that the bridge located in CE panel.
But they are talking about two different configurations of bridge.
82-on manual owners should find a relay in the slot. And the bridge is a wire jumper near where tranny harness attaches in hatch area. If automatic, instead of the jumper, there is a shift linkage position switch ensuring car will only start in P or N.
See the third document below.
That bridge only exists in the CE panel of manual cars, MY 1981 and earlier.
(Alan is picturing a bridge in a late model panel, maybe his 94, for which purpose is a backup light bridge)
Mid year manual cars have a start bridge, but its located in the hatch area.
And, beginning 1982, both auto and manuals have the start relay.
See the first 2 documents below.
The confusion comes in when people with manual cars newer than 1981 go searching for the start bridge so solve a no-turnover issue and find a relay.
Its perpetuated because the manual start bridge is referenced in relay diagrams, including PET and 928specialist site, and has a part number. This co-location infers that the bridge located in CE panel.
But they are talking about two different configurations of bridge.
82-on manual owners should find a relay in the slot. And the bridge is a wire jumper near where tranny harness attaches in hatch area. If automatic, instead of the jumper, there is a shift linkage position switch ensuring car will only start in P or N.
See the third document below.
Last edited by Landseer; 12-12-2012 at 06:01 AM.
#19
Race Car
I never did understand why this interlock was put into place for "safety". Starting an automatic car in gear is much less dangerous than starting a manual car in gear, with the torque converter not being direct drive with the wheels when stationary.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C 475hp/460lb.ft
#20
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I never did understand why this interlock was put into place for "safety". Starting an automatic car in gear is much less dangerous than starting a manual car in gear, with the torque converter not being direct drive with the wheels when stationary.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C 475hp/460lb.ft
#21
Intermediate
Need a little help with starter bridge issue
First...I have an 82 928 S (manual). From what I have read from the previous posts is that my 928 has both the relay(XIV) and a bridge (somewhere in the spare wheel well). Is this correct?
I ordered the Relay referencing the wiring diagram and part numbers from Porsche International..According to this wiring diagram Relay XIV for 82-84 model years has part no. 92861247300(Bridge for Starter-M/T). I ordered the part but it is not a relay. I have included a picture. I am assuming that this is for the bridge in the sparewheel well.
Ok...I have two questions - 1) What is the part no for the relay that goes in the relay XIV spot? And 2) Can someone point me to a picture or explain where I can find the bridge in the spare wheel well? I dont see it, and have no idea where else it could be.
Thanks.
I ordered the Relay referencing the wiring diagram and part numbers from Porsche International..According to this wiring diagram Relay XIV for 82-84 model years has part no. 92861247300(Bridge for Starter-M/T). I ordered the part but it is not a relay. I have included a picture. I am assuming that this is for the bridge in the sparewheel well.
Ok...I have two questions - 1) What is the part no for the relay that goes in the relay XIV spot? And 2) Can someone point me to a picture or explain where I can find the bridge in the spare wheel well? I dont see it, and have no idea where else it could be.
Thanks.
#22
Electron Wrangler
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You can use a standard 53B relay from Roger (etc) for any starter relay (even the early model start DISABLE relays) - or in fact you can use any standard Bosch SPST or SPDT relay (but get a reputable brand).
The bridge goes behind the plastic cover in the spare wheel well - above the battery box and ahead (in the car) of the spare wheel. many have never realized its there until directed to it - there may be a 'felt' like cover over it. You most likely already have a similar bridge installed there.
Alan
The bridge goes behind the plastic cover in the spare wheel well - above the battery box and ahead (in the car) of the spare wheel. many have never realized its there until directed to it - there may be a 'felt' like cover over it. You most likely already have a similar bridge installed there.
Alan