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#1 |
Join Date: Apr 2009
Location: ITALY
Posts: 261
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Hi guys, i don't understand a thing...in the 93/95 schematic, where is the second relay?
If i well understand put the second relay in 90/92 cars is to update the circuit like the most new ones...it's correct? |
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#2 | |
![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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![]() Quote:
The additional relay (not pictured) is inserted between the CLUTCH SWITCH and the STARTER on the 90-92 schematic. (On the 93-95 there is little reason to install the additional relay, unless the factory START RELAY is so difficult to get to [I don't know] that it justifies installing the axillary - simply to move the high current switching to a more convenient location.) And Cliff, the RED line is the high current path. The GREEN line on the 93-95 schematic is the low current "signal path" showing how the CLUTCH SWITCH is isolated from the high current path; a marked improvement, methinks. Hope this helps clear things up. ![]() |
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#3 |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,817
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What is the input and function of the starter enable in the Central Control Module (90-92)?
The CCM function activates the Starter Enable Relay (90-92)? Then we have the higher current load passing through the Clutch Start Switch (90-92) which we reduce that current load using an additional Relay which provides a much shorter and unencumbered path between the Battery and Starter Solenoid. On the 90-92 we eliminate the ignition switch path between the battery and Starter Solenoid as well using the New Relay. If we installed the New Relay on the 93-95 we would be using direct current between Battery and Starter Solenoid not relying on current passing through the Ignition Switch (in that regard the same benefit as on a 90-92).
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Clickable links ![]() On Iphone Touchable Links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 06-27-2014 at 08:40 AM. |
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#4 |
Join Date: Apr 2009
Location: ITALY
Posts: 261
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Sorry...what is HOTB????
Thanks |
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#5 |
![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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Sorry.
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#6 |
![]() Join Date: Oct 2006
Location: jacksonville, florida
Posts: 43
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Looking for a start cure. I have a 90 ZR1 and for years it starts fine but after I stop and leave it for an hour or so and come back I push in the clutch, turn the key, all proper lights come on but starter will not turn over. I leave it for 2 or 3 hours and it will then start fine. I bypassed the VATS system but still have the problem. Is it the clutch switch or the starter relay or something else. It is a 3700 mile car.
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#7 | |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,817
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Do lights dim when you turn key to start? I always install the Starter Relay and along with that always recondition the starter solenoid and points (and check armature bearings for smoothness and starter Brushes).
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Clickable links ![]() On Iphone Touchable Links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS |
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#8 |
![]() Join Date: Oct 2006
Location: jacksonville, florida
Posts: 43
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Lights do not dim. Solenoid does not click. It acts just like a VATS problem but it has been bypassed.
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#9 | |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,817
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![]() Quote:
I assume you installed the Starter Relay taking direct current from battery to Starter Solenoid when activated by a lower required current to activate the Relay itself through the Clutch Switch.
__________________
Clickable links ![]() On Iphone Touchable Links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 11-01-2015 at 08:39 PM. |
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#10 |
![]() Join Date: Oct 2006
Location: jacksonville, florida
Posts: 43
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No have not touched clutch switch or added relay. It is bone stock. I am to old to be removing battery boxes and adding another relay. Could it be the clutch switch or original relay?
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