CBs, fuses good, what else?

Mike87 · 12-26-2010, 07:20 PM

I accident crossed my wires on the vsv (heater). Pretty much everything is not working on gauge fuse 7.5 now but CBs and fuses are good. But ido have power to seats and door locks. No tach, ac, windows, defog, etc. Any ideas? Main..not sure how to check if bad. Thanks, mike....

87 supra turbo auto

cre · 12-26-2010, 07:39 PM

Did you actually replace the Gauge fuse or just visually "inspect" it? If the fuse IS new and definitely good then test at the fuse box to see if voltage is getting that far with the key in the "on" position. If it is then follow the line and test at the next junction. The circuit branches off pretty quickly, IIRC so you should have to look far. Many of the non-operations components you list as on different grounds, so that's out.

Mike87 · 12-27-2010, 06:11 PM

Thanks for the info. The fuse was checked with a meter. Good, went to next level, junction box, nothing. Hmm, wondering if relays are bad. Searching on how to check relays. Saw something abot testing wire coming out of relay but do not see any wires coming from relays. Will look again. Specifics not working:
Climate control and blower
Tach
Turbo gauge
Oil gauge
Overdrive
Power trans option
Windows
Lumbar

Seats, mirrors, radio, clock, lights, signals all work

Thanks for any info... mike

cre · 12-27-2010, 08:51 PM

No CB's or relays after the fuse. If you did as directed and actually tested for voltage AT the fuse and there's nothing it's a wiring problem.

Mike87 · 12-28-2010, 12:11 AM

It is a wiring issue. The defog and main fuse relays each only have one hot hole. From what i have read there should be two of four. I checked the other relays as a test and they each have two hot, two not. I guess i go to tracing now. Fun, fun. Thanks. Mike

cre · 12-28-2010, 12:17 AM

yellow wire on the defog switch is the gauge fuse... ign needs to be ON.

What are you referring to while troubleshooting this?

http://www.cygnusx1.net/Supra/Library/TEWD/MK3/ ?

Mike87 · 12-28-2010, 04:16 PM

Yes, the link given is what I am using. Open to others if u know of any. Thanks

Mike87 · 12-30-2010, 02:55 PM

Reside complete now. Thanks for the help. Love your mr2!

cre · 12-30-2010, 04:08 PM

Glad to hear it! So what specifically was the problem? Wiring's a bitch, eh?

And thanks! I really like it too.

12-26-2010, 07:20 PM	#1
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	CBs, fuses good, what else? I accident crossed my wires on the vsv (heater). Pretty much everything is not working on gauge fuse 7.5 now but CBs and fuses are good. But ido have power to seats and door locks. No tach, ac, windows, defog, etc. Any ideas? Main..not sure how to check if bad. Thanks, mike.... 87 supra turbo auto

12-26-2010, 07:39 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Did you actually replace the Gauge fuse or just visually "inspect" it? If the fuse IS new and definitely good then test at the fuse box to see if voltage is getting that far with the key in the "on" position. If it is then follow the line and test at the next junction. The circuit branches off pretty quickly, IIRC so you should have to look far. Many of the non-operations components you list as on different grounds, so that's out. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-27-2010, 06:11 PM	#3
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	CBs, relays, fuses good, now what... Thanks for the info. The fuse was checked with a meter. Good, went to next level, junction box, nothing. Hmm, wondering if relays are bad. Searching on how to check relays. Saw something abot testing wire coming out of relay but do not see any wires coming from relays. Will look again. Specifics not working: Climate control and blower Tach Turbo gauge Oil gauge Overdrive Power trans option Windows Lumbar Seats, mirrors, radio, clock, lights, signals all work Thanks for any info... mike

12-27-2010, 08:51 PM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	No CB's or relays after the fuse. If you did as directed and actually tested for voltage AT the fuse and there's nothing it's a wiring problem. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-28-2010, 12:11 AM	#5
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	Vsv cross wires causing wiring issues It is a wiring issue. The defog and main fuse relays each only have one hot hole. From what i have read there should be two of four. I checked the other relays as a test and they each have two hot, two not. I guess i go to tracing now. Fun, fun. Thanks. Mike

12-28-2010, 12:17 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	yellow wire on the defog switch is the gauge fuse... ign needs to be ON. What are you referring to while troubleshooting this? http://www.cygnusx1.net/Supra/Library/TEWD/MK3/ ? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-28-2010, 04:16 PM	#7
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	Defog and main relay rewire Yes, the link given is what I am using. Open to others if u know of any. Thanks

12-30-2010, 02:55 PM	#8
Mike87 Stock Join Date: Aug 2010 Location: SC Posts: 11	Rewire complete after vsv crossed Reside complete now. Thanks for the help. Love your mr2!

12-30-2010, 04:08 PM	#9
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Glad to hear it! So what specifically was the problem? Wiring's a bitch, eh? And thanks! I really like it too. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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