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help me install my boost gauge!

Re: boost gauge intall?

BillBoost37 said:
Now diagnose it.. Look up the code and check the heater circuit fuse.

As for the vacuum line. It doesn't matter where you T into the line. You need to be hooked in anywhere on the horseshoe of line from BCS to FPR to LIM to MAP. Doesn't matter a bit where in that line you tap in. Not sure why Blueguy was pushing you to put it in a nice clean location vs making a mess under the snout.
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which fuse is the heater circuit fuse? underhood fusebox or in car?
 


Re: boost gauge intall?

Sorry, I don't know. I have a Regal and it's a little different. Would have told you if I knew which one it was. You may have to do a lttle research. I'm sure if you search here, you can find something that'll help you out.
 
Re: boost gauge intall?

I don't think it is under hood fusebox because I don't see it on the fuse diagram.
 
Re: boost gauge intall?

anyone one know where i can get a replacement 1/8" rubber t fitting? Dropped mine behind the engine compartment..very dumb.

also i tapped the wires for the gauge into the orange illumination on the deck and ground and got nothing at night with my headlights on. I will try a 12v switched instead of the orange tomorrow. this install is taking way to long....
 


Thats funny the orange wire said illumination right on it. It was the wire that came out of the harness u plug into the actual car harness
 
The orange wire is an optional hook-up that will dim your gauge when your lights come on. I spliced my orange wire to one of the wires going to my fog light switch. It must have a full 12v signal, not a variable voltage that changes with your dash lights. A switch may be easier, but the results won't be as professional.
 
triebenbach07 said:
The orange wire is an optional hook-up that will dim your gauge when your lights come on. I spliced my orange wire to one of the wires going to my fog light switch. It must have a full 12v signal, not a variable voltage that changes with your dash lights. A switch may be easier, but the results won't be as professional.
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if it had a full 12v signal, wouldnt it have lit up right when the ignition is turned over? I couldn't get the gauge to light up at all.
 
also quick thing about the vac line hook up to the gauge itself, i followed the way to secure it with the furule and screw mounts, however i can still pull the vac tubing right out of the back of the gauge even when all hooked up. is this normal with the autometer mech gauges??
 


I don't understand how. I followed the instructions it came with and it doesn't secure 100% to the back of the gauge
 
what gauge do you have? I am looking for a brand name here, so I can better help you. or please tell me what color wires are in your gauge pigtail.

red-should be a switched power source, like your ignition. Mine is spliced into my fuel pump power
yellow- idk if your cluster would have this, mine does do to multiple color backlight choices. but should be a constant 12v. i hooked mine up to the yellow wire on my HU harness
black- find a good ground
orange- switched 12v. most people splice this wire into their headlight switch. on my gauge (glowshift) this power signal dims the backlight by 30%.
 
triebenbach07 said:
what gauge do you have? I am looking for a brand name here, so I can better help you. or please tell me what color wires are in your gauge pigtail.

red-should be a switched power source, like your ignition. Mine is spliced into my fuel pump power
yellow- idk if your cluster would have this, mine does do to multiple color backlight choices. but should be a constant 12v. i hooked mine up to the yellow wire on my HU harness
black- find a good ground
orange- switched 12v. most people splice this wire into their headlight switch. on my gauge (glowshift) this power signal dims the backlight by 30%.
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autometer self lit gauge. There is no wires coming from the gauge. There was just 2 contacts, 12v, and Ground.

according to this my dimmer might be gray not orange for some reason.

2004-2005 Pontiac Grand Prix with Monsoon Wiring Information
 
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gotcha.

the orange wire, in your case, won't do you a bit of good. I'm not used to these fancy new cars, mine's an 02

check voltage from your gray wire to ground. it should varie between 9.5v-12v as you adust you dimmer switch. just stick a probe of your multimeter in the back of the connector plug.
see how that works out.

good luck
 


update:

Couldn't get the dimmer function to work for the life of me just ended up tapping into a 12v switched.

So gauge is mounted and lights up great.

only little problem is I am getting a reading of 17hg vacuum t idle and about every 20 seconds it rises about 5 nd drops bck down to 17.

Does this mean there is a leak? any thoughts?
 
I think its supposed to read as follows. I'm not positive though, it was kind of hard to comprehend.

des19 said:
The only little problem is that I am getting a reading of 17hg vacuum. About every 20 seconds when it idles, vaccuum rises about 5hg (to 12hg) then drops bck down to 17.
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