sorry if this sounds like stupid question but....

I was trying to set my tps, and my lights would only flicker on and off, so i tried grounding the bottom (black) single horizontal wire and when it touched the firewall - spark! and blew my egi fuse.

my tps tester lights only flicker when I touch or jiggle the screw and it make's a clicking sound.

thanks for your help.

 

You mean, you grounded the B/W wire, that's the +12 V, no wonder it made the fuse blow.

It's normal to hear the clicks, they come from the solenoids for the switching and relief valves. that's the TPS checking procedure is based upon. See my web page under emissions->secondary air for more info.

Hugues -

 

Ok, let me get this straight, -I'm electrically uninclined-there are 3 wires in the TPS checker plug, I thought the 2 together on the top were the 12V and the single one on the bottom was the ground?
Is this not so?

 

the B/w is the 12 V, should be on its own.

then you have wire 1 to relief solenoid
and wire 2 to switching solenoid (should be the 2 that are on same row).

When wire 1 is grounded, you will hear the relief solenoid click and the light 1 will turn on (and stay on).

Same thing for wire 2 and light 2, except we're talking about the switching solenoid.

when I say 'this wire is grounded', it's the ecu that does it, ok. That's what the TPS adjusting is all about, you adjust when the ecu is grounding the corresponding ECU pins (ie, the wires on same row in check connector).

I don't know if it's very clear but I am sure you know what I mean. Just follow the testing procedure to the T and you should be fine.

Hugues -

 

I think I understand,
so, when my test lights only flicker on for 1 second (they don't stay on) the ecu's grounding isn't staying gounded?

Does this mean there is a bad ground somewhere?

or maybe I made my test light wrong and was plugging it incorrectly.
I'll check when I get home....thanks for your help.

 

my test lights were wired wrong. Got it working. Love my car.