P1780 2000 toyota camry le

[Mike Gerber]

jason,

You're welcome.

Mike

[kclaws]

thank you for this thread. I had the problems describe in this thread and it was the wiring near the hinge.

[Dannydg]

I followed the instructions on this thread and the problem was resolved. I knew that there was an easy fix on the web, thanks to all of you who contributed.

[Old fixerup]

My introduction to this forum is too late to have possibly saved money. I too had the conditions covered above and since we were approaching Christmas I pacicked and went to a dealer. They changed the neutral safety switch for about $550. After reading the posts I checked the wiring and found no problems. I did find indications that they checked the loom. I could not tell if they changed any lights in the trunk lid. Maybe it was the switch. By the way I have 243,000 miles on the car and other than regular servicing I have only spent a few hundred dollars on the emission system.

[97toyotacam]

Thanks, I was able to fix my car. My car actually had the reverse lights on the tail of the car and the R light on the dash lit all the time (pressing the brake or not pressing the brake). I also had to change the fuse since I blew it during the wiring fix outlined in this thread. My Camry is a 1997 xle with 103K miles (btw few very good mechanics thought this was a transmission issue when they saw the symptoms)

[Joe W]

I ran into a somewhat related issue with my 99 Camry. When I applied the brakes the brake dash light would light. After finding a burned out bulb I replaced it but still got the dash light. I checked the wire loom, (it appeared OK), and searched the forum and found a post (cant find it again) that recommended replacing light bulbs in pairs as different bulbs may offer different resistance and thus trigger the dash light. After replacing the other brake light with the same as the new replacement the dash light issue was fixed.

[99toycam_Boston]

1999 Toyota Camry P1780 failed inspection:
I just registered to this site specifically to say THANK YOU for this post. I failed my MA inspection yesterday (as anticipated, because my dashboard was lit up like a Christmas tree). I anticipated having to pay hundreds of dollars, but then decided to google my car issues:
-Check Engine light on
-Rear lights light on
-Brake light on
-Reverse light on (when the headlights were on)
-License plate lights out
-Back-up lights out

With the car running great, my mechanic had said that the check engine light problem was around the transmission and he'd have to start digging (translate: cost lots of money). Armed with this post after searching the P1780 code, I went into my mechanic and confidently told him to start at the wire loom in the trunk, replace the bulbs, and see where we stood before charging me any more money. Only $188 dollars later, I passed my inspection with flying colors! Definitely would have spent more money without you guys, so, thanks a million. Hope that this post helps other 1999 camry owners, too!

[mikeborgsdorf]

Same problem here--2001 Camry LE, 135K miles, failed the smog check. After spending $260 to make repairs for 2 other codes that came up, the check engine light was still on, and the P1780 was the code that came up.
My back-up lights weren't working, the light out indicator was on, and the R light came on every time I hit the brake. My brilliant wife decided to google the code, and found this forum. We printed it out for the mechanic and asked him to check out the wiring. Sure enough, 3 burned wires in the trunk harness. Forty bucks later, he fixed the wires, all of the back lights on the car work, no more check engine light, no more code, passed the smog check. Much better than paying hundreds of dollars to fix a transmission switch. Now our mechanic knows, and I hope others find this information as well. Big thanks to automotiveforums.com!