I use a 12v solenoid to switch my boost gauge supply line from the intake to the exhaust. The ebrake power is used to switch it when the e-brake comes on. It automatically switches back to boost when the e-brake goes off. All automatic, no extra gauge to buy and mount. Works absolutely perfectly. Only problem is you need at least a 50psi boost gauge.
E-mail me and I will help you locate the parts needed.
Larry
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1972 Chinook class C with 96/215 5spd, 4/5" exh, 4"BD, MagHytec, 85gal fuel, K&N RE0880, AutoMeter, 370's, BD gov kit, BD afc kit, 16cm, 16%btdc, yada-yada-yada
www.fostertruck.com/cummins
E-mail me and I will help you locate the parts needed.
Larry
------------------
1972 Chinook class C with 96/215 5spd, 4/5" exh, 4"BD, MagHytec, 85gal fuel, K&N RE0880, AutoMeter, 370's, BD gov kit, BD afc kit, 16cm, 16%btdc, yada-yada-yada
www.fostertruck.com/cummins