here is a wierd one

Asked by Feb 08, 2015 at 07:32 PM about the 2000 Toyota Tacoma

Question type: Maintenance & Repair

2000 Tacoma 4X4 quad cab v6, automatic tranny.
When my left turn signal is on, the rpms run away when I give it the gas, either passing or turning left from a stop. This does not happen when in 1st or second, but only in drive.

I don't know what my turn signal has to do with my transmission!?, I can only assume that there is some kind of electronic transmission control that is being interfered with when the left turn signal is on.

A few other symptoms are:
1: left turn signal flashes really fast, but the bulb is flashing front and rear, so a bulb is not out.

2: When applying the brakes, the left arrow on the dash lights dimly.

3: The tranny runs away also when the flashers are on, even when the left signal is not on.

14 Answers

42,435

Couple of questions: Have you owned this for a long time or did you recently purchase truck? When you say RPM's run away, do you mean they go way up, or do you lose RPM's?

42,435

It may be your power steering pressure switch that is bad. I think you have noticed it on left turns. I don't think your turn signal has anything to do with it. Read this link. Go to the bottom where it says symptoms. http://www.ehow.com/info_8748803_power-steering-pressure-switch- do.html

Had the truck for 6 or 7 years . What I mean is that the tranny acts like it is slipping or going into neutral so the RPMs are going up when I give it the gas because there is no load on the tranny. .

Well, I have experimented many times and the left turn signal being on is a definite issue. Go down the road...hit the left turn signal and the engine revs, left turn signal off and revs go away.

42,435

Try pulling the fuse to the blinkers. Hit the blinker. If no increase, I would start following the left blinker wire. It may have fused itself to another wire.

When this first started, I noticed a jerking when turning left and thought maybe a ball joint or something, buy later noticed everything works fine when the left signal is not used.

I noticed in the electrical schematics that there is a transmission control module. Perhaps there is a short somewhere or ground in the left blinker circuit that is effecting then TCM. Will try pulling the blinker fuse and see what happens.

42,435

So when you make a left sharp turn with no blinker, there is no increase or decrease in the RPM's?

42,435

Keep me posted....this is a good one!

Right, no issues when turning left with left blinker or hazards off....weird huh?

42,435

Very weird......

20

Did you ever find the answer to this? I am having a similar problem with my 2004 Tacoma Prerunner. When cruising on the highway in overdrive, if I use my turn signal, it seems my transmission drops out of overdrive and the rpms jump to the click of the turn signal.

2 of 2 people found this helpful.

This thread is old but I just had and resolved the same problem on my 2003 4runner. Left rear reverse light was poorly grounded(loose??) . seriously. that was it. Same exact symptoms as the original post nothing unless in drive. left turn signal or flashers caused engine stutter/ transmission slipping feeling... traced out all grounds - fine... then thought about towing lights being a source and noticed that the left rear reverse light wasn't coming on when tracing them out. checked bulb and in taking it out the reverse/ fast blink problem went away. bulb was fine. reinstalled and no more problem. everything back to normal... very very weird.

Just had a similar problem start with my 2001 4 door prerunner. Signalling either way sometimes makes it act like it's in neutral as well as when I press the brake pedal it goes into neutral(if I'm going down hill and in 2 to use the engine braking and I add some brake it goes into "neutral"). I have a mil light code that says "park/neutral switch malfunction". I've already unhooked my trailer light harness but sounds like I may need to better clean the stock connection. Still not sure how this relates to anything with the trans. Also occasionally when I press the brakes and the lights are turned off, all of the interior lights will come on. Any educated input is appreciated.

Your Answer

Tacoma

Looking for a Used Tacoma in your area?

CarGurus has 50,718 nationwide Tacoma listings and the tools to find you a great deal.

ZIP:

Toyota Tacoma Experts

  • #1
    Tom Demyan
    Reputation
    1,140
  • #2
    BURT100
    Reputation
    350
  • #3
    jtubbs
    Reputation
    340
View All

Related Models For Sale

Used Toyota Tundra
676 Great Deals out of 38,169 listings starting at $2,900
Used Ford F-150
3,198 Great Deals out of 239,103 listings starting at $1,300
Used Nissan Frontier
397 Great Deals out of 25,331 listings starting at $1,800
Used Toyota 4Runner
358 Great Deals out of 27,337 listings starting at $1,750
Used Chevrolet Silverado 1500
2,703 Great Deals out of 196,294 listings starting at $699
Used GMC Sierra 1500
1,237 Great Deals out of 71,061 listings starting at $1,750
Used Jeep Wrangler
457 Great Deals out of 20,145 listings starting at $3,000
Used Ford Ranger
178 Great Deals out of 5,466 listings starting at $1,250
Used Dodge Ram 1500
413 Great Deals out of 11,099 listings starting at $1,499
Used Ford F-250 Super Duty
387 Great Deals out of 53,699 listings starting at $1,899

Used Cars For Sale

2017 Toyota Tacoma For Sale
32 Great Deals out of 30,408 listings starting at $13,995
2016 Toyota Tacoma For Sale
109 Great Deals out of 3,025 listings starting at $18,712
2015 Toyota Tacoma For Sale
158 Great Deals out of 3,348 listings starting at $12,999
2014 Toyota Tacoma For Sale
84 Great Deals out of 1,910 listings starting at $8,900
2013 Toyota Tacoma For Sale
83 Great Deals out of 2,253 listings starting at $7,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.