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View Full Version : issues with a/c compressor and speedo.

smdodgers
07-15-2012, 07:46 PM
Well, I swapped my s13 redtop sr about 4 months ago. when i plug in the speed sensor the speedo reads double the speed im going.
if im going 20 it says 40..so on and it maxes out on 60 mph. which reads 120 on the dash. it has a fuel cut off after that. any ideas?

i also have an A/c issue. I had custom lines made to fit the compressor on my sr. the thing is that the ac button has a green light which should mean it has a connection but everytime i turn on the a/c i blow a fuse immediately. the a/c was working fine when i was filling it up with freon. but then after that it just keeps blowing fuses. what could it be?

240sx s14 95' SE
with s13 redtop sr20det swap.

thanks for viewing.
codyace
07-15-2012, 07:48 PM
Stinks you didn't have a custom setup by me to make it all work.


In order to fix your setup you need to decide and determine what lines control what off the TP switch. Once you determine that I can help you out.
smdodgers
07-15-2012, 07:54 PM
how can i get a custom setup by you sir? :D
smdodgers
07-15-2012, 08:02 PM
Oh i saw your page, but the lines are already connected and have freon. I just need to know why it keeps on blowing fuses
Agamemnon
07-15-2012, 08:25 PM
Your speed reads double because you're using an S13 speedo sensor on an S14 cluster. Get your self an S14 sensor and all should be well.
smdodgers
07-15-2012, 08:34 PM
Your speed reads double because you're using an S13 speedo sensor on an S14 cluster. Get your self an S14 sensor and all should be well.

just the plug itself? because i ordered a lower harness from wiring specialties
Agamemnon
07-15-2012, 09:28 PM
just the plug itself? because i ordered a lower harness from wiring specialties
What plug are you referring to?

S14 sensor for an S14 cluster.
smdodgers
07-15-2012, 09:48 PM
Your speed reads double because you're using an S13 speedo sensor on an S14 cluster. Get your self an S14 sensor and all should be well.

What plug are you referring to?

S14 sensor for an S14 cluster.

oh naw nvm i get you now. i have to put an s14 speed sensor. well that solves that lol.

now the ac....
ultimateirving
07-17-2012, 04:36 PM
My little a/c box was shorting out and causing the green light to pop on and off inconsistently. I bought a new box and that fixed my issue, But other wise you need to track down the a/c(compressor power) switch wire, and find out where the short is.

Make sure its plugged into your compressor too, if it came out and the lead is touching grounds it could pop fuses