snomobeelr Posted September 5, 2014 Share Posted September 5, 2014 I am Installing a Vacuum pump. It is getting mounted in the front passenger side fender pocket next to the Battery. Two wires. One to ground and the other has to be to Ignition Switched Power and it has an inline fuse. Do I need run the power wire back to the interior to get to a Ignition Switched Power source? Or can I go to one of the starter Wires or coil Wire for the HEI ? Thanks Quote Link to comment Share on other sites More sharing options...
footballubet Posted September 6, 2014 Share Posted September 6, 2014 Don't tap into the supply wire for the HEI. Do you have an electric choke wire you could splice into? If you can't find anything in the engine compartment then you'll need to go inside. Quote Link to comment Share on other sites More sharing options...
snomobeelr Posted September 7, 2014 Author Share Posted September 7, 2014 There are only two wires Ground and the power to ignition. I ran a 12 gauge wire to the interior and directions said to put a 15 amp inline fuse in. So I put the inline fuse with a female terminal and I plugged it into the the Ignition tab . I also tried the Accessory tab. The 15 amp fuse keeps blowing. There is also a 20 amp inline fuse by the motor. That one does not blow. its weird. It one wire from interior to the Vacuum motor. Don't know why it keeps blowing. The ground Wire I ran to the Ground on the battery because I mounted the pump right next to it. Quote Link to comment Share on other sites More sharing options...
Toppless72 Posted September 7, 2014 Share Posted September 7, 2014 1. What is the amp draw of the vacuum pump? 2. If you hook the pump directly to the battery using a fuse on the positive wire, does the fuse blow? 3. Have you had this unit hooked up and working before? 4. Have you checked to see how much voltage you have on the wire coming from your fuse box? 5. If you put some other load IE: fan motor, head lamp, etc. on the wire coming from the fuse box, does the fuse blow. Do some testing and post your findings. Quote Link to comment Share on other sites More sharing options...
footballubet Posted September 7, 2014 Share Posted September 7, 2014 Sounds like the pump is pulling more than 15 amps. Good place to start. Quote Link to comment Share on other sites More sharing options...
snomobeelr Posted September 7, 2014 Author Share Posted September 7, 2014 I tested the pump when I got it. Hooked it up to the battery and it had worked and did not blow the inline 20 amp fuse. I looked it up and it says the Pump uses 4 amps. I will have to check to see how much is coming from the tab on the fuse block I was using. I am working today will have to check when I get home. Heres a link to the instructions. http://static.summitracing.com/global/im...0and%20inst.pdf Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted September 7, 2014 Share Posted September 7, 2014 the accessory fuse is the fuse for many other things, your pump is putting that fuse over the edge i would wire in a relay to control the pump, esp when you are mounting the pump so close to the battery Quote Link to comment Share on other sites More sharing options...
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