# 87 Mits Montero electrical issue

**URL:** <https://community.cartalk.com/t/87-mits-montero-electrical-issue/18348>\
**Category:** Maintenance/Repairs\
**Created:** [August 18, 2008, 6:52pm UTC](https://community.cartalk.com/t/87-mits-montero-electrical-issue/18348 "2008-08-18T18:52:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![haretic](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@haretic](https://community.cartalk.com/u/haretic)\
**Post date:** [August 18, 2008, 6:52pm UTC](https://community.cartalk.com/t/87-mits-montero-electrical-issue/18348/1 "2008-08-18T18:52:16Z")

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Have an 87 Mits Montero 5 spd single ohd cam. Just replaced a broken rocker arm everything else mechanical appeared ok. Battery will not hold a charge, I know it is bad. But tried to jump this vehicle to see it start. First turn of key got all warning lights (as expected) and cranked about a second. Then totally dead. Now no electrical at all while still hooked up to jumpers. Could this be a fuse or the alternator?

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**Author:** ![researcher](https://avatars.discourse-cdn.com/v4/letter/r/edb3f5/32.png) [@researcher](https://community.cartalk.com/u/researcher)\
**Post date:** [August 18, 2008, 8:54pm UTC](https://community.cartalk.com/t/87-mits-montero-electrical-issue/18348/2 "2008-08-18T20:54:39Z")

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Unless you have really heavy gauge jumper wires, the ‘jump’ is more a boost than starting from the donor battery. A running donor car will charge the donee battery to the point where that will crank the donee engine. Monitor the the Montero battery at the posts using a DVM during the charging and when the key is turned ‘on’ and to ‘start’. If the voltages are below 9 volts DC during either of these, service the battery and try again.