andy york Posted May 26, 2010 Share Posted May 26, 2010 OK ...the special smoke crap is driving me crazy. After swapping all the relays yesterday and thinking all is well... after about 50 miles today, I running 90 on the freeway and had a couple of stumbles. then about 30 seconds later I'm fighting to get to the shoulder. pull the seat....hand on fuel pump...turn key ...nothing. swap 2 relays ...nothing. all fuses good. long story short... 2 "bad relays". took one and cut it open....appears to be fine...installed it in fuel pump position....turn on key...little contact gets pulled to other contact like I think it should but no fuel pump... <_>What else is there about a relay to go bad? when I first pulled the relay it felt a bit warm....I guess I could be getting to much voltage.anyplace I should check other than at the battery? When the sweat dries, I'll cut open a good one just cause I can. Then I'll find my multimeter and try to get some readings have fun out there andy Link to comment Share on other sites More sharing options...
Kiwi_Roy Posted May 27, 2010 Share Posted May 27, 2010 OK ...the special smoke crap is driving me crazy. After swapping all the relays yesterday and thinking all is well... after about 50 miles today, I running 90 on the freeway and had a couple of stumbles. then about 30 seconds later I'm fighting to get to the shoulder. pull the seat....hand on fuel pump...turn key ...nothing. swap 2 relays ...nothing. all fuses good. long story short... 2 "bad relays". took one and cut it open....appears to be fine...installed it in fuel pump position....turn on key...little contact gets pulled to other contact like I think it should but no fuel pump... <_>What else is there about a relay to go bad? when I first pulled the relay it felt a bit warm....I guess I could be getting to much voltage.anyplace I should check other than at the battery? When the sweat dries, I'll cut open a good one just cause I can. Then I'll find my multimeter and try to get some readings have fun out there andy Check the socket, if the contacts loose will heat the relay Pump current x resistance = heat Link to comment Share on other sites More sharing options...
andy york Posted May 27, 2010 Author Share Posted May 27, 2010 upon further examination, all of the 16 or17 relays I have laying around will work in the headlight but not run the fuel pump. I admit being better at mechanical but this electrical is driving me nuts. andy Link to comment Share on other sites More sharing options...
raz Posted May 27, 2010 Share Posted May 27, 2010 Unless fuse #2 is blown I guess your fuel pump went tits up Link to comment Share on other sites More sharing options...
andy york Posted May 27, 2010 Author Share Posted May 27, 2010 upon further examination, the 5 amp fuse was blown #1. evidently it supplies some sort of control voltage to the relay. my assumption that a relay is good if used in the headlight circuit. most of the relays would operate the headlight so why would the fuel pump not work. hot wired the fuel pump....it is OK....cut open a good relay and installed it at fuel pump location....turn key on....relay energizes but no fuel pump. check fuses again....this time #1 5 amp blown. replace fuse...fuel pump works now. time for bed....will try and see if relay gets hot tomorrow.. I need a whiskey:drink: andy Link to comment Share on other sites More sharing options...
raz Posted May 27, 2010 Share Posted May 27, 2010 ... hot wired the fuel pump....it is OK....cut open a good relay and installed it at fuel pump location....turn key on....relay energizes but no fuel pump. ... When you hot wired the pump, did you do that in the relay socket or directly to the pump? Link to comment Share on other sites More sharing options...
andy york Posted May 27, 2010 Author Share Posted May 27, 2010 When you hot wired the pump, did you do that in the relay socket or directly to the pump? hot wired the pump direct andy Link to comment Share on other sites More sharing options...
raz Posted May 27, 2010 Share Posted May 27, 2010 hot wired the pump direct andy Just for the record, try doing it in the relay socket. It should go like this: | | | __ <- jump this one __ <- with this one If that makes the pump run, but an activated relay doesn't... well, then some things are not what they seem. Link to comment Share on other sites More sharing options...
Kiwi_Roy Posted May 28, 2010 Share Posted May 28, 2010 Just for the record, try doing it in the relay socket. It should go like this: | | | __ <- jump this one __ <- with this one If that makes the pump run, but an activated relay doesn't... well, then some things are not what they seem. Note: You are also jumpering the supply to coils and injectors, all fed from Relay 5 Guzzy_Wiring May 16 2010.pdf Link to comment Share on other sites More sharing options...
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