radiator fan is not going on
#1
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Location: 626, CA
Posts: 103
Likes: 0
Received 0 Likes
on
0 Posts
radiator fan is not going on
hello guys might be a noob question but am having trouble figuring out whats wrong with my car the radiator fans will not go on. i checked the fan and its good i also checked all the fuses and the fan relay and their all good. i jumped the cooling fan switch and it still dont go on? does any one have any feedbacks? thanks
#2
Honda-Tech Member
Join Date: Dec 2005
Location: farmington, mo, united states
Posts: 343
Likes: 0
Received 0 Likes
on
0 Posts
Re: radiator fan is not going on
What vehicle? Factory engine? You cooling fan switch acts as a ground for the fan relay. When the switch closes it turns on the relay which send power to the fan. Best way to diagnose is with a volt meter. Start by checking voltage on both sides of the relay. If they both checkout then check at the power side of the switch. Check the grounds for both the fan switch and the fan. I couldn't tell ya exactly where they are. You can jump the switch by grounding the power wire. That would tell you there a prob with the switch or your ground if the fan turns on.
#6
Re: radiator fan is not going on
Unhook 2-pin connector of radiator fan.
Put a jumper wire on thermo-switch( plugged at thermostat housing).
Switch to ON II.
Use a test light or voltmeter to see if there is battery voltage on the 2-pin connector of radiator(wire side).One wire should have voltage.
Test for continuity of the other terminal to body ground. You should have continuity.
If no voltage at 2-pin connector:
Remove fan relay(underhood fuse/ relaybox)
Key still on ON II, thermo-switch jumped
Use your voltmeter or test light, check for voltage on each of the 4 pin slots of the relay.
You should have 2 points energized. If you get none or only one,
Check The ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
All the above are in the under hood fuse/relay box.
#17 (7.5A) Underdash fuse relaybox.
Put a jumper wire on thermo-switch( plugged at thermostat housing).
Switch to ON II.
Use a test light or voltmeter to see if there is battery voltage on the 2-pin connector of radiator(wire side).One wire should have voltage.
Test for continuity of the other terminal to body ground. You should have continuity.
If no voltage at 2-pin connector:
Remove fan relay(underhood fuse/ relaybox)
Key still on ON II, thermo-switch jumped
Use your voltmeter or test light, check for voltage on each of the 4 pin slots of the relay.
You should have 2 points energized. If you get none or only one,
Check The ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
All the above are in the under hood fuse/relay box.
#17 (7.5A) Underdash fuse relaybox.
#7
Honda-Tech Member
Thread Starter
Join Date: Oct 2007
Location: 626, CA
Posts: 103
Likes: 0
Received 0 Likes
on
0 Posts
Re: radiator fan is not going on
@ axis11 am not getting no voltage on the 2 pin connector of the radiator wire side..
i checked for voltage on each 4 pin slots of the relay and am only getting one point energized i checked the ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
#17 (7.5A) Underdash fuse relaybox.
and they are all good any other advice?
thanks alot guys really appreciate the help
i checked for voltage on each 4 pin slots of the relay and am only getting one point energized i checked the ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
#17 (7.5A) Underdash fuse relaybox.
and they are all good any other advice?
thanks alot guys really appreciate the help
Trending Topics
#9
Honda-Tech Member
Join Date: Dec 2005
Location: farmington, mo, united states
Posts: 343
Likes: 0
Received 0 Likes
on
0 Posts
Re: radiator fan is not going on
^ lol no. For whatever reason you not getting voltage to the relay. I don't have a diagram to say which fuse is in that circuit, but when you know that, the next thing to do would be check voltage at the fuse.
#11
Re: radiator fan is not going on
@ axis11 am not getting no voltage on the 2 pin connector of the radiator wire side..
i checked for voltage on each 4 pin slots of the relay and am only getting one point energized i checked the ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
#17 (7.5A) Underdash fuse relaybox.
and they are all good any other advice?
thanks alot guys really appreciate the help
i checked for voltage on each 4 pin slots of the relay and am only getting one point energized i checked the ff. fuse
# 41(80A)
# 42(40A)
# 57 (20A)
#17 (7.5A) Underdash fuse relaybox.
and they are all good any other advice?
thanks alot guys really appreciate the help
Which terminal is energized, left or right side(when you are in front of car and facing the car)?
Thread
Thread Starter
Forum
Replies
Last Post
4DRmafia
Honda CRX / EF Civic (1988 - 1991)
3
09-06-2004 05:19 PM