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Chris(aka-Moose)
Chris(aka-Moose), Nissan Technician
Category: Nissan
Satisfied Customers: 592
Experience:  16 years of experience
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Ac relay started not functioning unless yo moved it, so i

Customer Question

ac relay started not functioning unless yo moved it , so i wedged it to make sure that it was a loose socket before i pulled the relay box loose to check so it worked, now the ac compressor will not engauge even if you move the relay but you can hear some kind of click around the intake the engine pulls down some but no ac, i switched the car off and turned the compressor and it spins also when i jump it at evaporator it clicks at intake but no engage ???
JA: How many miles are on the car? Has the car been starting normally?
Customer: 120 and yess
JA: What is the model/year of your Nissan?
Customer: 2000
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: yes and i have entered that already
JA: Anything else you want the mechanic to know before I connect you?
Customer: You
ac relay started not functioning unless yo moved it , so i wedged it to make sure that it was a loose socket before i pulled the relay box loose to check so it worked, now the ac compressor will not engauge even if you move the relay but you can hear some kind of click around the intake the engine pulls down some but no ac, i switched the car off and turned the compressor and it spins also when i jump it at evaporator it clicks at intake but no engage ??? no
Submitted: 6 months ago.
Category: Nissan
Expert:  david craig replied 6 months ago.

Hi Im David, thanks for visiting the site. lets pull the relay out. put a jumper between the B+ Position and one of the positions with no voltage. if its a 4 position relay. there will be 12vdc on 2 positions with key on. jump from one of them to one of the no voltage positons. see if the compressor kicks on.

Customer: replied 6 months ago.
Ok will do
Expert:  david craig replied 6 months ago.

keep me posted please. thanks

Customer: replied 6 months ago.
sir
Customer: replied 6 months ago.

Yes it kicked on

Customer: replied 6 months ago.

Yes when I jumped it at relay it engaged

Expert:  david craig replied 6 months ago.

ok. good. please give me a second

Expert:  david craig replied 6 months ago.

now. there should be another relay thats the same right in that area. is there?

Customer: replied 6 months ago.

yes and ive went and bought a new one and switched them around and still wont kick on

Expert:  david craig replied 6 months ago.

ok let me pull a print on the system

Expert:  david craig replied 6 months ago.

this is a 2000 nissan what? and size engine?

Customer: replied 6 months ago.

thx it all started out as if the relay was loose so i wedged some elec tape be side it and it worked fine then all of a sudden it stopped , well i removed relay box turned it over removed the female part that the relay goes in squeezed the female connectors a little tighter then replaced all back still no ac clutch engage, only when i jump it out, also checked therm coupl hod constant power on red tried the green ones and it never came on ???

Expert:  david craig replied 6 months ago.

give me a sec

Customer: replied 6 months ago.

no problem brother

Expert:  david craig replied 6 months ago.

this is a 2000 nissan what? and size engine

Customer: replied 6 months ago.

xterra 6 cyl

Expert:  david craig replied 6 months ago.

ok thanks

Expert:  david craig replied 6 months ago.

heres a print

Customer: replied 6 months ago.

what do u think needs to be checked next

Expert:  david craig replied 6 months ago.

the fuses. do you have a meter?

Customer: replied 6 months ago.

yes ive checked all fuses wth volt meter and multi meter

Expert:  david craig replied 6 months ago.

ok. check the relay for battery power on one of the positions.

Customer: replied 6 months ago.

i did if you are looking down from passenger fender it has power at the 6 and 9 oclock positions

Expert:  david craig replied 6 months ago.

how many slot on the relay base

Customer: replied 6 months ago.

4 i

i i

i

like this is the fender

Expert:  david craig replied 6 months ago.

send me a picture

Expert:  david craig replied 6 months ago.

another print

Customer: replied 6 months ago.

so what controls the relay to close and start the compressor because i can close it manually and it engauges then i release it it is like a set of points

Expert:  david craig replied 6 months ago.

you can engage it with a jumper in the relay?

Customer: replied 6 months ago.

yes and by closing the relay

Expert:  david craig replied 6 months ago.

ok, let me look to see where it should be getting the power

Customer: replied 6 months ago.

ok brother can we take this up tomorrow morning i am a disabled vet straight out of the wounded warrior i have to take my meds to help me sleep and am afraid i willcrash pl;ease post what you think i need to check, i thought it might be the pressure switch ?????

Expert:  david craig replied 6 months ago.

ok brother, i will see you tomorrow

Customer: replied 6 months ago.

thx good luck hunting

Expert:  david craig replied 6 months ago.

yep

Customer: replied 6 months ago.

have you found anything

Customer: replied 6 months ago.

how can i check the binary switch on the dryer

Expert:  david craig replied 6 months ago.

binary switch?

Customer: replied 6 months ago.

pressure switch

Expert:  david craig replied 6 months ago.

its not going to be the presuure switch. the signal to activate the relay comes directly from the ignition switch

Customer: replied 6 months ago.

what about the ficd solenoid , ive got power on two prongs but doesnt some thing ground to shut the relay to then engauge the compressor ?

Customer: replied 6 months ago.

i also could hear something click near the center of towards back of intake when i moved the relay before now i dont hear it but the engine kinda sounds like its in a pull when it was clicking but i dont hear it unless i jump it out

Expert:  david craig replied 6 months ago.

the only thing you can do is a continuity test of the complete circuit. jumpering switch and solenoids arent going to do anything for you until you know the wiring is ok.

Customer: replied 6 months ago.
Ok it ta takes me awhile been disabled but I will get it check it just seems to me like something isn't grounded so I'm switch somewhere else or solenoid to tell to go ahead and ground the relay to send the power to the compressor
Expert:  david craig replied 6 months ago.

and thats why you need to check the wiring.

Expert:  david craig replied 6 months ago.

any news?

Expert:  david craig replied 6 months ago.

checking in to see how its going