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Discussion Starter · #1 ·
Hate to post this question, but I have read through multiple "how to" threads and researched online.

I have an autometer 4777 boost gauge. As per autometers instructions the power wire should be connected to a power source that is only on when the ignition switch is turned to the "on" position and is not interrupted by the ignition switch starting. Like most accessories are... I have tried all the normal fuse locations and they are either a constant on or are interrupted for starting. Any suggestions which fuse will not be interrupted during starting?

Tia.

"8. Connect the red power wire to a switched +12 volt source that maintains power during engine cranking. Most vehicles break the electrical
connection to accessories while the engine is being started. If the boost gauge is connected to one of these circuits, the auto zero function will not work properly and inaccurate readings will result. To determine whether a switched source maintains power during starting, look for electrical accessories in the vehicle that remain on while the engine is being started. Connect the red power wire to the same circuit that powers one of these accessories. The connection can be tested by turning the key switch from off to on, the pointer will move backward to the stop pin and then move to zero. Once the pointer has reached zero, start the engine. If the pointer reads vacuum without returning to the stop pin, a suitable connection has been found. If the pointer moves to the stop pin and then reads vacuum, another power circuit must be found."
 

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Get yourself a fuse tap from a local auto parts store (like the one pictured below) along with some 7.5amp or 10amp fuses. Take one of the new fuses and insert it into the top slot just like the picture shows.



Find fuse #18 in the fuse block under the driver side dash (diagram below), that's the reverse light fuse which has power when the ignition switch is "on" and when you crank the engine. Remove the fuse from #18 and insert it into the bottom slot on the fuse tap. Connect the power wire from your boost gauge to the wire on the fuse tap and insert your fuse tap into slot #18 in the fuse block. :thumbup:

 

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Discussion Starter · #3 ·
Sounds good, I will give that slot a try. I have been using that exact setup you posted above. Makes the install so much cleaner.

I'll report back if that's successful! Thanks again!
 

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Discussion Starter · #5 ·
Good man, it works as it should now! Thanks a lot for the very detailed and quick response... This thread would be a good addition to the boost gauge "how to" as well because of your help!
 

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I needed this info too.

STICKY!
 
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