Quick question
MBWorld Fanatic!
Joined: Mar 2010
Posts: 1,909
Likes: 4
From: San Diego
F-250
I think my estimate is low, but I think 4 years is a very safe bet
All figures were made up in my head, so probably very accurate.
I run mine all the time too:
Ran positive wire (fused at battery) through car to passenger foot wel. There I installed a 30A relay. I tapped into the cigarette lighter hot wire which switches with ignition.
That switched power triggers the relay, which in turn powers the pump via the lead I pulled from trunk. Pump ground is local to the pump.
Relay Wiring:
R-2 Intercooler Relay
30*– + out to pump
85 – Ground
86 – Ignition Switched Power (Cig Lighter)
87* – Power from Battery (Fused at battery)
When 86 gets power, it closes 30 to 87. Whala, Pump runs. If this is your area of expertise I apologize, just wanted to share
- The stock Bosch pumps started showing issues around 5 years when wired in normally. The Johnson should have a little longer life.
- By not cycling, I would assume the pump would run 20% more.
- If the Johnson is 15% better than the Bosch, you would start with 5.75 years
- If the pump is running 20% more, this would bring you to 4.6 years.
All figures were made up in my head, so probably very accurate.
I run mine all the time too:
Ran positive wire (fused at battery) through car to passenger foot wel. There I installed a 30A relay. I tapped into the cigarette lighter hot wire which switches with ignition.
That switched power triggers the relay, which in turn powers the pump via the lead I pulled from trunk. Pump ground is local to the pump.
Relay Wiring:
R-2 Intercooler Relay
30*– + out to pump
85 – Ground
86 – Ignition Switched Power (Cig Lighter)
87* – Power from Battery (Fused at battery)
When 86 gets power, it closes 30 to 87. Whala, Pump runs. If this is your area of expertise I apologize, just wanted to share
Last edited by Bramage; Aug 27, 2012 at 01:44 PM.
